Grip assemblies and related methods

ABSTRACT

Presently disclosed grip assemblies provide for a selectively removable and replaceable grip for a shaft. Such grip assemblies include a grip sleeve and a grip liner at least partially fixed to an inner grip surface of the grip sleeve. The grip liner is configured to expand as the grip sleeve and grip liner are positioned on the shaft. The grip liner includes a liner feature that engages a shaft feature, which may be integrally formed on the shaft, or may be formed on a shaft sheath on the shaft. Engagement of the liner feature with the shaft feature may align the grip sleeve to the shaft and may substantially prevent rotation of the grip sleeve with respect to the shaft once the grip sleeve is on the shaft. Presently disclosed grip sleeves may be selectively removed from the shaft without damaging the grip sleeve, and without requiring solvents or specialized tools.

RELATED APPLICATION

This application claims priority to U.S. patent application Ser. No.15/609,920, entitled “Grip Assemblies and Related Methods,” which wasfiled on May 31, 2017, and the complete disclosure of which isincorporated herein by reference.

FIELD

The present disclosure relates to grip assemblies and related methods.

BACKGROUND

Handle portions of sports and recreational equipment often include agrip for improved handling and/or for shock absorption. These grips maybe constructed of flexible materials such as leather, rubber, or othersynthetic materials. Conventional grips may be wrapped around the handleand glued in place, or molded grips may be installed using tapes andsolvents. In either case, typical users of the grips may not possess theskill required to apply the grips properly, and/or removal of the gripsmay be difficult and/or time consuming. Some conventional grips requirespecialized equipment for removal, such as air compressors. Removal ofthe grip is often a destructive process.

Previous attempts at providing a removable grip that may be removed andreplaced in less time and/or with less skill have been unsuccessful insome applications. For example, in the case of golf club grips, previousattempts have been expensive, too large to fit the golf club shaftproperly, do not conform to the taper of the golf club shaft, do notpreserve the tapered shape of the golf club shaft, add a significantamount of weight to the golf club, and/or still require the use ofspecialized tools.

SUMMARY

Presently disclosed grip assemblies may address these and othershortcomings in the prior art. Examples of grip assemblies according tothe present disclosure may allow for quicker and easier removal andreplacement of grips, as compared to prior art grips. In some examples,grip assemblies according to the present disclosure may be removedand/or placed onto a shaft or handle without the use of sharp tools,chemicals (e.g., solvents), or tape. In some examples, the equipment maybe used immediately after placement of the grip assembly, rather thanhaving to wait for adhesives or other chemicals to dry, as may be thecase with prior art grips. Similarly, presently disclosed gripassemblies may be relatively inexpensive, conform to the desired shape(e.g., the tapered shape of a golf club shaft), add minimal weight tothe shaft or handle, and/or fit within the space constraints of theparticular application.

In one example according to the present disclosure, a grip assemblyincludes a grip sleeve and a grip liner, a portion of which is fixed, orattached, to an inner grip surface of the grip sleeve. The grip sleevedefines an interior space and is configured to be selectively positionedon a shaft such that a portion of the shaft is within the interiorspace. The grip sleeve is further configured to be selectively removedfrom the shaft. The grip sleeve comprises an outer grip surface forengagement by a user, and the inner grip surface opposite the outer gripsurface that faces the interior space. The grip sleeve generally isconstructed of a resilient material.

The grip liner is partially fixed, or attached, with respect to the gripsleeve such that it is configured to radially expand in response to anoutward radial force exerted on the grip liner, from a restingconformation to an expanded conformation. The grip liner may besubstantially tubular in overall shape (e.g., in the restingconformation) and includes a discontinuity and a liner feature thatextend longitudinally along a longitudinal axis of the grip liner. Thediscontinuity facilitates radial expansion and contraction of the gripliner between the resting conformation and the expanded conformation.The liner feature is configured to mate with a shaft feature associatedwith the shaft and restrict rotation of the grip sleeve relative to theshaft when the shaft is positioned within the interior space (andtherefore when the liner feature and the shaft feature are mated).

Kits including such grip assemblies are also disclosed, and include ashaft sheath that is configured to be positioned between the grip sleeveand the shaft, such as to retrofit a shaft (e.g., a golf club shaft) toinclude the selectively removable and replaceable grip sleeve. The shaftsheath is configured to be positioned adjacent the shaft such that aninner sheath surface is coupled to the shaft, and the shaft feature isprovided on an outer sheath surface opposite the inner sheath surface.

Golf clubs are also disclosed, such as golf clubs that include presentlydisclosed grip assemblies positioned on a portion of the golf clubshaft.

Methods of replacing a grip on a shaft are also disclosed. Methodsgenerally include providing a grip assembly according to the presentdisclosure and positioning the grip sleeve of the grip assembly on theshaft, such as by sliding the grip sleeve onto the shaft while engagingthe liner feature and the shaft feature. Such methods may additionallyinclude securing the grip sleeve with respect to the shaft using asecurement mechanism.

Methods of assembling, or constructing, a selectively replaceable gripassembly may include providing a grip sleeve, and securing a grip lineradjacent the inner grip surface of the grip sleeve, thus forming a gripassembly according to the present disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic representation of non-exclusive examples of gripassemblies according to the present disclosure.

FIG. 2 is a perspective, exploded schematic view of non-exclusiveexamples of grip assemblies according to the present disclosure.

FIG. 3 is a schematic representation of a top plan view of one exampleof a suitable shape for a liner feature and/or a shaft feature for gripassemblies according to the present disclosure.

FIG. 4 is a schematic representation of a top plan view of anotherexample of a suitable shape for a liner feature and/or a shaft featurefor grip assemblies according to the present disclosure.

FIG. 5 is a schematic, partial cross-sectional view of a portion of aliner feature or shaft feature for grip assemblies according to thepresent disclosure.

FIG. 6 is a schematic, partial cross-sectional view of a portion of aliner feature or shaft feature for grip assemblies according to thepresent disclosure, having undercut edges.

FIG. 7 is a cross-sectional view of one example of a grip assemblyaccording to the present disclosure, positioned on a shaft.

FIG. 8 is a schematic, cross-sectional view of one example of a gripliner for presently disclosed grip assemblies, the grip liner includinga liner feature in the form of a ridge.

FIG. 9 is a schematic, cross-sectional view of another example of a gripliner for presently disclosed grip assemblies, the grip liner includinga liner feature in the form of a ridge.

FIG. 10 is a perspective view of an example of a grip liner forpresently disclosed grip assemblies, the grip liner including a linerfeature in the form of a ridge.

FIG. 11 is a schematic, cross-sectional view of one example of a gripliner for presently disclosed grip assemblies, the grip liner includinga liner feature in the form of a channel.

FIG. 12 is a schematic, cross-sectional view of another example of agrip liner for presently disclosed grip assemblies, the grip linerincluding a liner feature in the form of a channel.

FIG. 13 is a schematic, cross-sectional view of another example of agrip liner for presently disclosed grip assemblies, the grip linerincluding a liner feature in the form of a channel.

FIG. 14 is a schematic, cross-sectional view of another example of agrip liner for presently disclosed grip assemblies, the grip linerincluding a liner feature in the form of a channel.

FIG. 15 is a schematic, cross-sectional view of another example of agrip liner for presently disclosed grip assemblies, the grip linerincluding a liner feature in the form of a channel.

FIG. 16 is a perspective view of an example of a grip liner forpresently disclosed grip assemblies, the grip liner including a linerfeature in the form of a channel.

FIG. 17 is a schematic, cross-sectional view of an example of a shaftfeature for grip assemblies according to the present disclosure, theshaft feature being in the form of a ridge.

FIG. 18 is a schematic, cross-sectional view of another example of ashaft feature for presently disclosed grip assemblies, the shaft featurebeing in the form of a ridge.

FIG. 19 is a perspective view of a tapered shaft feature integrallyformed with the shaft, the shaft feature being in the form of a ridge.

FIG. 20 is a perspective view of an example of a shaft sheath includinga shaft feature, applied to a shaft, the shaft feature being in the formof a ridge.

FIG. 21 is a schematic cross-sectional view of one example of a shaftsheath on a shaft, the shaft sheath including a shaft feature in theform of a channel.

FIG. 22 is a schematic cross-sectional view of another example of ashaft sheath on a shaft, the shaft sheath including a shaft feature inthe form of a channel.

FIG. 23 is a perspective view of an example of a shaft featureintegrally formed into a shaft according to the present disclosure, theshaft feature being in the form of a channel.

FIG. 24 is a perspective view of one example of a shaft plug for asecurement mechanism for presently disclosed grip assemblies.

FIG. 25 is a schematic representation of non-exclusive examples of kitsincluding grip assemblies according to the present disclosure.

FIG. 26 is a flowchart diagram of methods of applying presentlydisclosed grip assemblies to a shaft.

FIG. 27 is a flowchart diagram of methods of constructing gripassemblies according to the present disclosure.

DESCRIPTION

FIGS. 1-25 provide examples of grip assemblies 10 according to thepresent disclosure, kits 140 including the same, and/or components ofgrip assemblies 10. Elements that serve a similar, or at leastsubstantially similar, purpose are labeled with like numbers in each ofFIGS. 1-25, and these elements may not be discussed in detail hereinwith reference to each of FIGS. 1-25. Similarly, all elements may not belabeled in each of FIGS. 1-25, but reference numerals associatedtherewith may be utilized herein for consistency. Elements, components,and/or features that are discussed herein with reference to one or moreof FIGS. 1-25 may be included in and/or utilized with any of FIGS. 1-25without departing from the scope of the present disclosure. In general,elements that are likely to be included in a particular embodiment areillustrated in solid lines, while elements that are optional areillustrated in dashed lines. However, elements that are shown in solidlines may not be essential and, in some embodiments, may be omittedwithout departing from the scope of the present disclosure.

FIGS. 1-7 schematically illustrate grip assemblies 10, or portions orcomponents thereof. With reference to FIGS. 1-2, a grip sleeve 12according to the present disclosure is shown positioned on shaft 14,such that a portion 16 (FIG. 1) of shaft 14 is positioned within aninterior space 18 defined by grip sleeve 12 (though in some examples theentire shaft 14 may be positioned within interior space 18) in FIG. 1.Grip assembly 10 (which includes shaft 14, in some examples) is shown inan exploded view in FIG. 2. Grip sleeve 12 is configured to beselectively positioned on shaft 14, and further configured to beselectively removed from shaft 14. For example, grip sleeve 12 may bepositioned on shaft 14 (and removed therefrom) without damaging gripsleeve 12, without the use of solvents or adhesives, and/or without theuse of specialized tools, such as air compressors. In this manner, onceselectively removed, grip sleeve 12 may be reused and selectively placedonto the same or a different shaft 14. As indicated in FIGS. 1 and 2,shaft 14 may be described as having a butt end region 19 and a head endregion 21 opposite the butt end region.

Grip sleeve 12 includes an outer grip surface 20 for engagement by auser. For example, a user may grip, or hold, shaft 14 via outer gripsurface 20 such that the user contacts outer grip surface 20 when usingshaft 14. Grip sleeve 12 includes an inner grip surface 22 that isopposite outer grip surface 20, such that inner grip surface 22 facesinterior space 18. Grip sleeve 12 is generally constructed of aresilient material (e.g., rubber or another polymer) and may beconfigured to provide a non-stick grip for a user, and/or may providesome cushioning or impact-absorption between the user's hand and shaft14. In some examples, grip sleeve 12 may be formed of an elasticmaterial.

Grip assembly 10 includes a grip liner 24 positioned adjacent inner gripsurface 22, such that grip liner 24 is positioned interiorly to gripsleeve 12 (e.g., grip liner 24 is positioned between grip sleeve 12 andshaft 14 when grip sleeve 12 is positioned on shaft 14). Grip liner 24is radially expandable between a resting conformation and an expandedconformation and is substantially tubular in overall shape in someexamples. As used herein, “substantially tubular” refers to objects thatare elongated and hollow, which may or may not have a circularcross-sectional area. Tapered or frustoconical objects are within thescope of “substantially tubular,” as used herein.

In some examples, only a portion of grip liner 24 is fixed, directlyattached, directly coupled to, or otherwise directly secured to gripsleeve 12 (e.g., to inner grip surface 22), so as to allow expansion ofgrip liner 24 towards the expanded conformation when an outward radialforce is exerted on grip liner 24 from within. As grip liner 24 expandsto the expanded conformation, the volume within grip liner 24 increases,and/or an inner diameter 26 of grip liner 24 increases. Grip liner 24 isat least partially fixed with respect to grip sleeve 12, so as tosubstantially prevent rotation of grip liner 24 relative to grip sleeve12, which in turn facilitates proper alignment of grip sleeve 12 withshaft 14, as will be described in further detail, below. If grip liner24 is free to rotate with respect to grip sleeve 12, then suchrespective alignment may be compromised, but if grip liner 24 isentirely fixed within grip sleeve 12, then expansion of grip liner 24towards the expanded conformation may be hampered or undesirablyprevented, such as due to the material properties of grip sleeve 12.Thus, in some examples, grip liner 24 is only partially fixed within, orcoupled to grip sleeve 12, so as to substantially prevent rotation ofgrip liner 24 with respect to grip sleeve 12, but to also allow forexpansion of grip liner 24 towards the expanded conformation. That said,in some examples of grip assembly 10, an entirety of an outer linersurface 52 of the grip liner 24 may be fixed to inner grip surface 22 ofgrip sleeve 12, with the resilience of grip sleeve 12 facilitatingexpansion of grip liner 24 towards the expanded conformation.

In some examples, grip liner 24 is adhered, welded, molded into, orotherwise secured to grip sleeve 12 (e.g., to inner grip surface 22)along one or more lines that extend longitudinally along grip liner 24,and/or in discrete spaced-apart positions on grip liner 24. For example,adhesive may be applied in a continuous longitudinally-extending line toadhere at least a portion of grip liner 24 to the interior of gripsleeve 12. In some examples, adhesive may be applied in a broken linethat extends longitudinally along grip liner 24. Additionally oralternatively, grip liner 24 may be secured to grip sleeve 12 at one orboth ends of grip liner 24, and/or in positions therebetween.

Inner diameter 26 of grip liner 24 in the resting conformation may beless than a diameter 28 of shaft 14 onto which grip assembly 10 isconfigured to be placed in some examples. When grip sleeve 12 and gripliner 24 are positioned onto shaft 14, the diameter of grip liner 24 mayexpand towards the expanded conformation in order to accommodate shaft14 within grip sleeve 12 and grip liner 24. Grip liner 24 may be elasticor biased towards the resting conformation (e.g., may be formed of ashape memory material or may be formed of a rigid, semi-rigid, and/orelastic material) such that when the outward radial force is removed,grip liner 24 returns to the resting conformation. In some examples,grip liner 24 is formed of polyethylene terephthalate (PET),polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC),polycarbonate (PC), polytetrafluoroethylene (PTFE), and/or polyethyleneterephthalate glycol-modified (PETG).

To facilitate such radial expansion, grip liner 24 includes adiscontinuity 30 that extends longitudinally along a longitudinal axis32 of grip liner 24. In some examples, discontinuity 30 may extend theentire length of grip liner 24, such as from a first liner end 34 to asecond liner end 36 opposite first liner end 34, while in otherexamples, discontinuity 30 may extend only a portion of the length ofgrip liner 24. For example, in some examples, discontinuity 30 may notbe necessary toward a first liner end 34 (corresponding to a butt endregion 56 of grip sleeve 12), in so far as first liner end 34 and buttend region 56 need not expand, or expand significantly, to overcome adiameter 28 of shaft 14.

Discontinuity 30 is, in some examples, a longitudinal gap formed in gripliner 24 such that the gap widens as grip liner 24 expands towards theexpanded conformation, and shortens as grip liner 24 returns towards theresting conformation. In other examples, discontinuity 30 may be a slitformed in grip liner 24, such that there is substantially no such gap orseparation when grip liner 24 is in the resting conformation. Whenpresent, the longitudinal gap or slit may extend along the entire lengthof grip liner 24, or may extend along just a portion of the length ofgrip liner 24. Additionally or alternatively, discontinuity 30 mayinclude a flexible member (e.g., elastic webbing or similar material)spanning a slit or other discontinuity.

In some examples, discontinuity 30 may include an area of overlapbetween two or more layers that form grip liner 24. Grip liner 24 mayinclude a single discontinuity 30, or may include a plurality ofdiscontinuities 30, which may be circumferentially spaced apart aboutgrip liner 24 and/or may be longitudinally spaced apart along the lengthof grip liner 24.

Grip liner 24 also includes a liner feature 38 that extendslongitudinally along grip liner 24 (e.g., along longitudinal axis 32 ofgrip liner 24). Liner feature 38 is configured to mate with acorresponding shaft feature 40 associated with shaft 14 when grip sleeve12 and grip liner 24 are positioned on shaft 14. For example, one ofliner feature 38 and shaft feature 40 may be a ridge (which also may bereferred to as a projection), and the other of liner feature 38 andshaft feature 40 may be a channel (which also may be referred to as agroove, a depression, or a recess). In some examples, liner feature 38is a channel (e.g., a depression extending radially outward) and shaftfeature 40 is a corresponding ridge (e.g., a projection extendingradially outward) that fits at least partially within the channel-shapedliner feature 38. In other examples, liner feature 38 is a ridge (e.g.,a projection extending radially inward) that fits at least partiallywithin a channel-shaped shaft feature 40. Shaft feature 40 and linerfeature 38 may be sized and shaped correspondingly such that they areconfigured to engage with one another when grip sleeve 12 is positionedon shaft 14. Liner feature 38 and shaft feature 40 may be respectivelysized and shaped such that engagement of the two restricts rotation ofgrip sleeve 12 relative to shaft 14 when shaft 14 is positioned withininterior space 18 (and hence liner feature 38 and shaft feature 40 aremated). In some examples, engagement of liner feature 38 and shaftfeature 40 substantially prevents rotation of grip sleeve 12 withrespect to shaft 14. In some examples, discontinuity 30 may serve asliner feature 38. For example, discontinuity 30 may be an expandablechannel in some examples, that allows for expansion of grip liner 24towards the expanded conformation, and also engages with shaft feature40.

Similar to discontinuity 30, liner feature 38 may extend along theentire length of grip liner 24 (e.g., from first liner end 34 to secondliner end 36), or may extend along only a portion of the length of gripliner 24. Liner feature 38 may have a substantially constant width(e.g., arc length) along its length in some examples. In other examples,liner feature 38 may be tapered such that its width continuouslydecreases along its length. For example, FIG. 3 schematicallyillustrates a top plan view of a suitable shape for liner feature 38that tapers from a first liner feature end 42 (which corresponds tofirst liner end 34, in some examples) to a second liner feature end 44(which corresponds to a second liner end 36, in some examples), or viceversa. In other words, in the wedge-shaped or tapered shape shown inFIG. 3, a width 46 of liner feature 38 may be at a maximum value 46′ ator toward first liner feature end 42, and may decrease to width 46″(e.g., the minimum value) at or toward second liner feature end 44, withwidth 46 decreasing continuously along the length 48 of liner feature38. By contrast, FIG. 4 illustrates a top plan view of another suitableshape (e.g., a rectangular shape) for liner feature 38, having asubstantially constant width 46 along length 48 of liner feature 38.FIGS. 3-4 also represent suitable and corresponding shapes for shaftfeature 40, as discussed below.

Returning to FIGS. 1-2, grip liner 24 may include a single liner feature38, or may include a plurality of liner features 38. In some examples,liner feature 38 overlaps discontinuity 30, as will be explained infurther detail with respect to FIGS. 8-16. In other examples, linerfeature 38 is circumferentially spaced apart from discontinuity 30. Asalso will be explained in further detail with respect to FIGS. 8-16,grip liner 24 may include multiple layers which may overlap and/or formliner feature 38.

Grip liner 24 may include an inner liner surface 50 and an outer linersurface 52 opposite inner liner surface 50. At least a portion of outerliner surface 52 may be coupled to (e.g., adhered to) inner grip surface22 of grip sleeve 12, or grip liner 24 may be integrally formed withgrip sleeve 12. Liner feature 38 may be formed or positioned on innerliner surface 50. For example, in grip assemblies 10 where liner feature38 is a channel, liner feature 38 may be an area of decreased thicknessor a recession formed in inner liner surface 50. In examples where linerfeature 38 is a ridge, liner feature 38 may be an area of increasedthickness or a projection extending radially inward from inner linersurface 50.

Grip liner 24 may extend along substantially an entire sleeve length 54of grip sleeve 12. For example, grip liner 24 may extend from a butt endregion 56 of grip sleeve 12 to a tapered end region 58 of grip sleeve12, the tapered end region 58 being opposite butt end region 56. Inother examples, grip liner 24 may extend along just a portion of length54 of grip sleeve 12.

Similar to liner feature 38, shaft feature 40 may have a substantiallyconstant width (e.g., arc length) along its length in some examples. Inother examples, shaft feature 40 may be tapered such that its widthcontinuously decreases along its length. For example, FIG. 3schematically illustrates a top plan view of a suitable shape for shaftfeature 40 that tapers from a first shaft feature end 60 to a secondshaft feature end 62. In other words, in the tapered shape shown in FIG.3, a width 46 of shaft feature 40 may be at a maximum value 46′ at ortoward first shaft feature end 60, and may decrease to width 46″ (e.g.,the minimum value) at or toward second shaft feature end 62, with width46 decreasing continuously along the length 48 of shaft feature 40. Bycontrast, FIG. 4 illustrates a top plan view of another suitable shapefor shaft feature 40, having a substantially constant width 46 alonglength 48 of shaft feature 40.

Returning to FIGS. 1-2, grip assembly 10 may include a single shaftfeature 40, or may contain a plurality of shaft features 40. In someexamples, shaft feature 40 is integrally formed in or on shaft 14 (e.g.,shaft feature 40 may be a channel integrally formed into shaft 40, ormay be a ridge integrally formed on shaft 14). For example, shaftfeature 40 may be formed by a decreased thickness portion of shaft 14(e.g., when shaft feature 40 is a channel), or by an increased thicknessportion of shaft 14 (e.g., when shaft feature 40 is a ridge). In otherexamples, grip assembly 10 may include a shaft sheath 64 that includesshaft feature 40. Such shaft sheath 64 may be coupled to shaft 14 orintegrally formed with shaft 14. For example, shaft 14 may have anelongate shaft core 17, with the shaft sheath 64 operatively coupled toshaft core 17 or configured to be operatively coupled to the shaft core17. In examples of grip assembly 10 including shaft sheath 64, shaftfeature 40 may be formed by a region of overlap between layers of shaftsheath 64 (e.g., in examples where shaft feature 40 is a ridge), or byspaced apart regions of overlap between layers of shaft sheath 64 (e.g.,in examples where shaft feature 40 is a channel). As used herein, shaftfeature 40 is said to be “associated with” shaft 14 whether shaftfeature 40 is integrally formed with shaft 14, or whether shaft feature40 is provided by a structure coupled to shaft 14 or shaft core 17thereof (e.g., shaft sheath 64).

Shaft 14 may include an outer shaft surface 66, and shaft sheath 64 maybe positioned adjacent to and coupled to (e.g., adhered to) outer shaftsurface 66, such that shaft sheath 64 is positioned interiorly to gripsleeve 12 and grip liner 24 when grip sleeve 12 and grip liner 24 arepositioned on shaft 14. In other words, an inner sheath surface 67 maybe adhered to shaft 14. In some examples, shaft sheath 64 is anadhesive-backed film applied to shaft 14. Shaft feature 40 may be formedor positioned on an outer sheath surface 68 of shaft sheath 64, theouter sheath surface 68 being opposite inner sheath surface 67. Forexample, in grip assemblies 10 where shaft feature 40 is a channel,shaft feature 40 may be an area of decreased thickness or a recessionformed in outer sheath surface 68. In examples where shaft feature 40 isa ridge, shaft feature 40 may be an area of increased thickness or aprojection extending radially outward from outer sheath surface 68. Ingrip assemblies including shaft sheath 64, shaft sheath 64 may beflexible and configured to conform to shaft 14. In some examples, shaftsheath 64 may have a nominal thickness, such as a thickness of less thanabout 0.001 inches, less than about 0.01 inches, less than about 0.025inches, and/or less than about 0.1 inches. Shaft sheath 64 may be formedof any suitable materials, such as ultra-high molecular weightpolyethylene (UHMW PE), vinyl, polycarbonate (PC), polyethyleneterephthalate (PET), polyethylene glycol modified (PETG), and/orpolytetrafluoroethylene (PTFE).

In grip assemblies 10 including shaft sheath 64, shaft sheath 64 andgrip liner 24 may be formed of materials configured to limit frictionbetween said shaft sheath 64 and grip liner 24. In other words, gripliner 24 and shaft sheath 64 may be in physical contact with one anotheras grip sleeve 12 is positioned on shaft 14, and correspondingly,respective materials may be selected such that the coefficient offriction between grip liner 24 (e.g., inner liner surface 50) and shaftsheath 64 (e.g., outer sheath surface 68) is less than 0.7, less than0.5, less than 0.4, less than 0.3, less than 0.2, less than 0.1, and/orless than 0.05, in order to facilitate positioning of grip sleeve 12onto shaft 14. Additionally or alternatively, respective materials forgrip liner 24 and shaft sheath 64 may be selected so that the force(e.g., the pulling or pushing forward along longitudinal axis 32)required to install and/or remove grip sleeve 12 and associated gripliner 24 from shaft 14 is less than 60 pounds, less than 50 pounds, lessthan 40 pounds, less than 30 pounds, and/or less than 20 pounds.Typically, grip liner 24 and shaft sheath 64 are formed of differentrespective materials, though they may be formed of the same material insome examples.

Once applied to shaft 14, shaft sheath 64 is generally prevented frommoving or rotating with respect to shaft 14, such that shaft sheath 64and shaft feature 40 are substantially fixed with respect to shaft 14 asgrip liner 24 and grip sleeve 12 of grip assembly 10 are slid intoposition on shaft 14. In this manner, engagement of liner feature 38 ofgrip liner 24 with shaft feature 40 (whether shaft feature 40 is formeddirectly on shaft 14 or provided by shaft sheath 64 on shaft 14) cansubstantially ensure proper alignment of grip sleeve 12 with respect toshaft 14 as grip sleeve 12 is being placed onto shaft 14. Suchengagement of liner feature 38 with shaft feature 40 can alsosubstantially prevent rotation of grip sleeve 12 with respect to shaft14, once grip sleeve 12 is placed on shaft 14. On the other hand, gripsleeve 12 is also selectively removable from shaft 14 by sliding gripsleeve 12 (and attached grip liner 24) with respect to shaft 14 and/orshaft sheath 64.

In some examples, grip assembly 10 includes an alignment guide 70. Forexample, shaft sheath 64 may include alignment guide 70, or shaft 14 mayinclude alignment guide 70. Alignment guide 70 may be configured tofacilitate proper alignment of shaft sheath 64 with respect to shaft 14.Additionally or alternatively, alignment guide 70 may be configured tofacilitate proper alignment of grip sleeve 12 with respect to shaft 14(and/or with respect to other components or features attached to shaft14, such as a club head), such as during placement of grip sleeve 12onto shaft 14. For example, grip sleeve 12 may not be radiallysymmetrical and alignment guide 70 may be configured to facilitatealignment of grip sleeve 12 with respect to shaft 14 in a desiredorientation. In some examples, proper alignment of shaft sheath 64 withrespect to shaft 14 (facilitated by alignment guide 70) may, in turn,have a secondary effect of aligning grip sleeve 12 with respect to shaft14, by ensuring the desired alignment of shaft feature 40 on shaftsheath 64 with respect to shaft 14.

In one specific example, shaft 14 may be a golf club shaft, with a golfclub head 15 secured to the shaft opposite grip sleeve 12. That is, head15 may be coupled to shaft 14 at a terminal end of head end region 21 ofthe shaft. In this case, grip sleeve 12 may need to be aligned withrespect to the golf club head for proper use, such as associated withindicia or grip patterns associated with the outer surface of gripsleeve 12. Accordingly, alignment guide 70 may be configured to enableproper positioning of shaft sheath 64 and/or grip sleeve 12 with respectto shaft 14 and the attached golf club head. In some examples, alignmentguide 70 may be a visible line or guide printed on, formed on, and/orencapsulated within shaft sheath 64. In some examples, alignment guide70 is encapsulated between layers of shaft sheath 64. In some examples,alignment guide 70 is associated directly with shaft 14 (e.g., printedor otherwise applied on shaft 14, or formed in or on shaft 14).

With reference to FIG. 2, grip assembly 10 may include a securementmechanism 72 for selectively securing grip sleeve 12 to shaft 14. Whilegrip sleeve 12 may fit tightly on shaft 14 (e.g., grip sleeve 12 may beconfigured to direct a force radially inward towards shaft 14 when gripsleeve 12 is positioned on shaft 14), and engagement between linerfeature 38 and shaft feature 40 may sufficiently prevent rotation ofgrip sleeve 12 with respect to shaft 14, securement mechanism 72 may beconfigured to substantially prevent longitudinal movement of grip sleeve12 with respect to shaft 14, once grip sleeve 12 is positioned on shaft14 and securement mechanism 72 is secured. In examples includingsecurement mechanism 72, securement mechanism 72 may include anysuitable mechanisms. For example, securement mechanism 72 may include asleeve collar 74 associated with grip sleeve 12 at a butt end 23thereof, a threaded shaft plug 76 positioned and secured within shaft14, and/or a fastener 78 configured to extend through sleeve collar 74and be threaded into shaft plug 76. Sleeve collar 74 may be rigid andpositioned within butt end region 56 of grip sleeve 12. Sleeve collar74, when present, may be molded into grip sleeve 12 (e.g., integrallyformed therewith), of the same material as grip sleeve 12, of adifferent durometer than the material of grip sleeve 12, insert moldedinto grip sleeve 12, and/or a separate component that is coupled to gripsleeve 12. In some examples, sleeve collar 74 may be arranged withrespect to grip sleeve 12 such that sleeve collar 74 is permitted tomove with respect to grip sleeve 12 but yet is prevented from beingfully removed from grip sleeve 12 without damage to grip sleeve 12and/or to sleeve collar 74. In other examples, sleeve collar 74 may beassociated with grip sleeve 12 such that sleeve collar 74 issubstantially prevented from moving with respect to grip sleeve 12.Other suitable securement mechanisms 72 may include one or more of ascrew and plug, a solid shaft having a threaded lug, a nut and bolt, acam, a clamp, a clip, a ratchet mechanism, an expanding plug, and/orlocking corresponding features.

Grip assembly 10 may be configured such that grip sleeve 12 may beselectively removed from shaft 14 without damage to grip sleeve 12, andthus later may be positioned on a second shaft after removal from shaft14. Additionally or alternatively, grip sleeve 12 may be later reusedand re-placed onto shaft 14 after it is selectively removed from shaft14. In some examples, grip sleeve 12 may be selectively positioned onand removed from shaft 14 by hand, advantageously without the use ofcompressed air, special tools, or solvents. Presently disclosed gripassemblies 10 may therefore provide a cost-effective and time-effectiveway to change and replace grips on shaft 14. Additionally oralternatively, some presently disclosed grip assemblies 10 may favorablyaffect the vibrational characteristics of shaft 14 as experienced by auser, which may lessen the shock (e.g., impact force) imparted to theuser when using shaft 14 with said grip assemblies 10.

Shaft 14 may be any shaft where it may be desirable to have a grip thatis selectively removable and replaceable according to the presentdisclosure. In some examples, shaft 14 is frustoconical and/or tapered,such that its width or diameter becomes consistently smaller traversingalong the shaft towards one end of shaft 14. In some such examples, gripliner 24 may be frustoconical when in the resting conformation. Forexample, grip liner 24 may be constructed such that in a relaxed stateprior to grip assembly 10 being installed on a corresponding shaft 14,grip liner 24 has a greater diameter at one end than another end, suchthat when grip assembly 10 is installed on a frustoconical shaft 14,grip liner 24 conforms to the shaft without substantial resistance.However, it also is within the scope of the present disclosure that gripliner is cylindrical in the resting conformation and easily conforms toa frustoconical shaft with minimal resistance when the grip assembly isinstalled thereon. Shaft 14 may be, for example, a shaft of a sportsclub or sports stick, or a handle for athletic equipment. In onespecific example, shaft 14 is a golf club shaft for a golf club thattapers in diameter towards the end of the shaft adjacent the club head.Thus, grip sleeve 12 may be a grip for a golf club or other sports clubor stick, in some examples.

In some examples, and as best seen in FIG. 2, grip sleeve 12 is tapered,such that a first grip sleeve diameter 80 at butt end region 56 isgreater than a second grip sleeve diameter 82 at tapered end region 58.Second grip sleeve diameter 82 may be smaller than a diameter of shaft14 at the location where grip sleeve 12 is first placed onto shaft 14.Thus, tapered end region 58 of grip sleeve 12 may temporarily expand(which may be facilitated by expansion of grip liner 24 towards theexpanded conformation) to be passed over shaft 14, as grip sleeve 12 ispositioned on shaft 14.

In other examples, grip sleeve 12 is not tapered at least when viewedfrom outer grip surface 20. In yet other examples, grip sleeve 12 mayhave a reverse taper when viewed from outer grip surface 20 (e.g., thegrip sleeve diameter at butt end region 56 may be less than the gripsleeve diameter at ‘tapered end region’ 58). In any of these examples,inner grip surface 22 of grip sleeve 12 may be tapered to correspond tothe tapered shape of shaft 14, or may be non-tapered or reverse taperedin accordance with the respective configuration of outer grip surface 20in the given example. For example, inner grip surface 22 of the gripsleeve may be tapered such that it has a non-constant inner diameter,while outer grip surface 20 may not be tapered, such that it has asubstantially constant diameter along its length.

As shown in FIGS. 5-6, liner feature 38 and/or shaft feature 40 may beundercut (FIG. 6), or may be normal (FIG. 5) to the surface from whichor into which it extends. FIG. 5 schematically represents both shaftfeatures 40 (which may be formed in or on shaft 14 or shaft sheath 64)and liner features 38 that are formed normal to the respective surface.For example, liner feature 38 may be a ridge that extends normal toinner liner surface 50 of grip liner 24, and shaft feature 40 may be acorresponding channel that is formed normal to outer shaft surface 66 ofshaft 14, or normal to outer sheath surface 68 of shaft sheath 64.Alternatively, liner feature 38 may be a channel that is formed normalto inner liner surface 50, and shaft feature 40 may be a ridge thatextends normal to outer shaft surface 66 or outer sheath surface 68.

Similarly, FIG. 6 schematically represents both shaft features 40 (whichmay be formed in or on shaft 14 or shaft sheath 64) and liner features38 that are undercut with respect to the respective surface, that is,that the sidewalls of the features are at an acute angle relative to theadjacent surfaces. For example, liner feature 38 may be a ridge that isundercut with respect to inner liner surface 50 of grip liner 24, andshaft feature 40 may be a corresponding channel that is undercut withrespect to outer shaft surface 66 of shaft 14, or undercut with respectto outer sheath surface 68 of shaft sheath 64. Alternatively, linerfeature 38 may be a channel that is undercut with respect to inner linersurface 50, and shaft feature 40 may be a ridge that is undercut withrespect to outer shaft surface 66 or outer sheath surface 68. Such linerfeatures 38 and/or shaft features 40 with one or more undercut edges maybe configured to further restrict rotation of grip sleeve 12 and gripliner 24 with respect to shaft 14, and/or may tighten or increase theforce of the engagement between liner feature 38 and shaft feature 40.In addition to the examples schematically represented in FIGS. 5 and 6,a channel and corresponding ridge may instead have sidewalls that are atan obtuse angle relative to the adjacent surface. Such liner features 38and/or shaft features 40 may be configured to more easily facilitatealignment and frictional sliding between liner feature 38 and shaftfeature 40, while at the same time still restricting relative rotationbetween grip liner 24 and shaft 14 when liner feature 38 and shaftfeature 40 are fully and operatively mated.

Turning now to FIGS. 7-25, illustrative non-exclusive examples of gripassemblies 10, kits 140, and/or components thereof are illustrated.Where appropriate, the reference numerals from the schematicillustrations of FIGS. 1-6 are used to designate corresponding parts inFIGS. 7-25; however, the examples of FIGS. 7-25 are non-exclusive and donot limit grip assemblies 10 to the illustrated embodiments. That is,grip assemblies 10 are not limited to the specific embodiments of theillustrated examples of FIGS. 7-25 and may incorporate any number of thevarious aspects, configurations, characteristics, properties, etc. ofgrip assemblies 10 that are illustrated in and discussed with referenceto the schematic representations of FIGS. 1-6 and/or the embodiments ofFIGS. 7-25, as well as variations thereof, without requiring theinclusion of all such aspects, configurations, characteristics,properties, etc. For the purpose of brevity, each previously discussedcomponent, part, portion, aspect, region, etc. or variants thereof maynot be discussed, illustrated, and/or labeled again with respect to eachembodiment or schematic illustration, however, it is within the scope ofthe present disclosure that the previously discussed features, variants,etc. may be utilized with other embodiments.

FIG. 7 illustrates a cross-sectional area of an example of grip assembly10 positioned on shaft 14, with grip liner 24 positioned interiorly togrip sleeve 12 (e.g., between grip sleeve 12 and shaft 14). As shown inFIG. 7, a portion of shaft 14 is positioned within interior space 18 ofgrip assembly 10 (though in some examples, the entire shaft 14 may bepositioned within interior space 18). Inner liner surface 50 of gripliner 24 is positioned adjacent outer shaft surface 66 (though may beadjacent outer sheath surface 68 of a shaft sheath 64, in someexamples). Outer grip surface 20 of grip sleeve 12 faces outward fromgrip assembly 10 for engagement by a user. While grip sleeve 12 may berelatively conforming (or tightly fit onto) to shaft 14, grip sleeve 12is further secured to shaft 14 via securement mechanism 72 in thisexample. As shown, fastener 78 extends through sleeve collar 74installed within butt end region 56 of grip sleeve 12, and then fastener78 is threaded into a threaded hole 138 formed in shaft plug 76 (withshaft plug 76 being fixed within shaft 14).

FIGS. 8-16 illustrate examples of grip liner 24, in both cross-section(FIGS. 8-9 and 11-15) and perspective views (FIGS. 10 and 16). FIGS.8-10 illustrate examples of grip liner 24 with a liner feature 38 in theform of a ridge (e.g., projecting radially inwardly from inner linersurface 50), whereas FIGS. 11-16 illustrate examples of grip liner 24with a liner feature 38 in the form of a channel formed into inner linersurface 50.

FIG. 8 illustrates a grip liner 84, which is an example of grip liner24. In this example, liner feature 38 is a ridge that projects radiallyinward from inner liner surface 50 (e.g., extends from inner linersurface 50 of grip liner 24). Grip liner 84 also includes discontinuity30 that extends longitudinally (e.g., along length 48, as indicated inFIG. 10). Grip liner 84 includes an area of overlap 86 where a firstportion 88 of grip liner 84 overlaps with a second portion 90 of gripliner 84. As grip liner 84 expands towards the expanded conformation,first portion 88 moves with respect to second portion 90, thus wideningdiscontinuity 30 to accommodate radial expansion of grip liner 84. Putanother way, a first portion 98 of liner feature 38 may be fixed withrespect to inner liner surface 50, while a second portion 96 of linerfeature 38 may not be attached to inner liner surface 50 such that firstportion 88 of grip liner 84 moves with respect to second portion 96 ofliner feature 38 when grip liner 84 expands towards the expandedconformation. In the example of grip liner 84, discontinuity 30 overlapsliner feature 38, though discontinuity 30 may be positioned anywherecircumferentially about grip liner 84.

As in all examples described herein, liner feature 38 may be taperedalong the length of grip liner 84, or may be of a substantially constantwidth (as schematically illustrated in FIGS. 3-4). Liner feature 38 mayhave edges that are undercut, or there may be no undercuts such thatliner feature 38 edges may be normal to outer liner surface 52 (asschematically illustrated in FIGS. 5-6). Grip liner 84 may be formed ofa single integral piece of material in some examples, while in otherexamples, grip liner 84 may be formed of a plurality of layers, asindicated by dashed line 94. For example, liner feature 38 may beintegrally formed with the rest of grip liner 84, or liner feature 38may be adhered to or otherwise coupled to inner liner surface 50. Gripliner 84 is shown in perspective view in FIG. 10.

In contrast to grip liner 84 of FIG. 8 (in which discontinuity 30overlaps liner feature 38), FIG. 9 illustrates a grip liner 100 (whichis an example of grip liner 24) where discontinuity 30 iscircumferentially spaced apart from liner feature 38. As grip liner 100expands towards the expanded conformation, discontinuity 30 widens toaccommodate such expansion. Liner feature 38 is positioned essentiallyopposite from discontinuity 30 in grip liner 100, though the two may bepositioned anywhere about the circumference of grip liner 100 withrespect to one another. Similar to grip liner 84 of FIG. 8, grip liner100 may be formed of a single integral piece of material, or, asindicated by dashed line 102, may be formed of multiple layers, such asby adhering, depositing, or otherwise coupling liner feature 38 to gripliner 100. In some examples, liner feature 38 (e.g., the ridge-shapedliner feature 38 of grip liner 100) is formed by an area of overlap 86between a first layer 112 and a second layer 114 of grip liner 100.First layer 112 and second layer 114 additionally or alternatively maybe described as or referred to as inner layer 112 and outer layer 114,with the outer layer being radially outward from the inner layer.Additionally or alternatively, liner feature 38 may correspond to or beformed by an area 118 of increased thickness (such as formed by theoverlap of multiple layers, or just an area of increased thickness ascompared to surrounding adjacent areas of a single layer). Grip liner100 is shown as tapered (e.g., narrower at one end of liner feature 38than at the opposite end), as indicated generally at 104. While part ofliner feature 38 of grip liner 84 of FIG. 8 was not attached to innerliner surface 50, in the example of grip liner 100 of FIG. 9, all ofliner feature 38 is fixed with respect to inner liner surface 50.

FIG. 11 shows an example of a grip liner 108 (which is an example ofgrip liner 24) with a liner feature 38 in the form of a channel. Edges92 of liner feature 38 may be straight edges (e.g. normal to outer linersurface 52), as illustrated, or may be undercut edges. Grip liner 108 isshown in perspective view in FIG. 16. FIG. 12 shows an example of a gripliner 110 (which is another example of grip liner 24) that is similar togrip liner 108 of FIG. 11, except that grip liner 110 includes aplurality of layers rather than being integrally formed or molded of asingle piece of material. As shown in FIG. 12, liner feature 38 of gripliner 110 is formed between spaced apart regions 86 of overlap between afirst layer 112 of grip liner 110 and a second layer 114 of grip liner110. In this manner, liner feature 38 is a channel formed by a decreasedthickness portion 116 of grip liner 110. In the example of grip liner110, first layer 112 is substantially fixed with respect to second layer114, with expansion of grip liner 110 being facilitated by expansion ofdiscontinuity 30 (in the form of a gap or slit formed along grip liner110), though in other examples, portions or all of respective layers maybe free to move with respect to one another during expansion andcontraction of the grip liner between the resting and expandedconformations. In some examples of grip liners 24 having multiple layers(e.g., grip liner 110 with first layer 112 and second layer 114), onlyone of the plurality of layers is coupled to grip sleeve 12 (e.g., toinner grip surface 22 of grip sleeve 12 of FIGS. 1-2). For example,adhesive may be applied to a portion of second layer 114 (e.g., along aportion of outer liner surface 52) to adhere grip liner 110 (or anotherexample of grip liner 24) within grip sleeve 12 of grip assembly 10.FIG. 13 shows grip liner 120 (which is another example of grip liner24), which is similar to grip liner 110 of FIG. 12, except thatdiscontinuity 30 is positioned such that it overlaps liner feature 38.

FIGS. 14-15 illustrate other multi-layered grip liners 24, in the formsof grip liner 122 (FIG. 14) and grip liner 124 (FIG. 15), each havingfirst layer 112 and second layer 114, and each with one or morediscontinuities 30 and a channel-shaped liner feature 38. In FIG. 14,liner feature 38 of grip liner 122 is formed in first layer 112, whilein in FIG. 15, liner feature 38 of grip liner 124 is formed by a portionof second layer 114 overlapping a space between respective portions offirst layer 112. In each of grip liner 122 and grip liner 124, firstlayer 112 and second layer 114 are free to move with respect to oneanother (e.g., when the grip liners expand towards the expandedconformation) in areas 86 of overlap between the layers. In grip liner122, each of first layer 112 and second layer 114 is coupled to theinner grip surface 22 of grip sleeve 12, and an elongate slit formsdiscontinuity 30 in first layer 112. Accordingly, first layer 112 isconfigured to radially expand and slide relative to second layer 114when grip liner 122 expands and contracts between the expandedconformation and the resting conformation. However, in grip liner 124 inportion 126 of overlap, first layer 112 and second layer 114 are fixedwith respect to one another (e.g., adhered or otherwise coupledtogether), and two discontinuities 30 are formed.

FIGS. 17-23 illustrate examples of shaft feature 40 and/or shaft sheath64, in both cross-section (FIGS. 17-18 and 21-22) and perspective views(FIGS. 19-20 and 23). FIGS. 17-20 illustrate examples of a shaft feature40 in the form of a ridge (e.g., projecting radially outwardly fromshaft 14 or from outer sheath surface 68 of shaft sheath 64), whereasFIGS. 21-23 illustrate examples of shaft feature 40 in the form of achannel formed into shaft 14 or outer sheath surface 68 of shaft sheath64. Ridge-shaped shaft features 40 (FIGS. 17-20) are configured to matewith corresponding channel-shaped liner features 38 as shown in FIGS.11-16, whereas channel-shaped shaft features 40 (FIGS. 21-23) areconfigured to mate with corresponding ridge-shaped liner features 38 asshown in FIGS. 8-10.

FIG. 17 illustrates an example of shaft feature 40 in the form of aridge, or projection, extending radially outward from outer shaftsurface 66 of shaft 14. As indicated by dashed lines 127 in FIG. 17 (andmore clearly visualized in FIG. 19), shaft feature 40 may be taperedsuch that its width varies along the length of shaft feature 40. FIG. 17illustrates a standalone shaft feature 40 that is applied directly toshaft 14. For example, an adhesive-backed shaft feature 40 may beadhered to shaft 14. In other examples, shaft feature 40 may bedeposited onto shaft 14, or otherwise coupled to shaft 14. In someexamples, and as shown in FIG. 19, shaft feature 40 may be integrallyformed into shaft 14. FIG. 19 shows a tapered shaft feature 40integrally formed with shaft 14. In all examples described herein, edges128 of shaft feature 40 may be undercut, or may be normal to the surfacefrom which they extend (e.g., may be normal to outer shaft surface 66 ofshaft 14). Shaft feature 40 could, for example, be configured to matewith liner feature 38 of FIG. 11, or any other liner feature 38 in theform of a suitable and corresponding channel described herein.

FIG. 18 illustrates a cross-section of one example of shaft sheath 64having shaft feature 40, with shaft sheath 64 wrapped around shaft 14(e.g., inner sheath surface 67 of shaft sheath 64 is adhered orotherwise coupled to outer shaft surface 66). Shaft feature 40 is in theform of a ridge extending radially outward from outer sheath surface 68of shaft sheath 64 in this example, with shaft sheath 64 being formed ofone or more layers of material. In some examples, and as indicated bydashed line 130, shaft feature 40 may be formed by two or more layers ofshaft sheath 64 overlapping one another in the area of shaft feature 40.FIG. 20 illustrates an example of shaft sheath 64 secured to shaft 14,with shaft sheath 64 substantially surrounding the entire circumferenceof shaft 14 in this example. In other examples, shaft sheath 64 mayextend around only a portion of shaft 14. As best seen in FIGS. 19-20,shaft feature 40 generally extends both longitudinally along shaft 14,and circumferentially about shaft 14.

FIGS. 21-23 illustrate examples of channel-shaped shaft features 40,with FIGS. 21-22 illustrating examples of shaft feature 40 formed inshaft sheath 64 applied to shaft 14, and FIG. 23 illustrates achannel-shaped shaft feature 40 formed directly in shaft 14 (e.g.,recessed into the surface of shaft 14). FIG. 21 illustrates an exampleof a single-layer shaft sheath 64, whereas FIG. 22 illustrates anexample of a multi-layer shaft sheath 64 applied to shaft 14, having anouter sheath layer 132 and an inner sheath layer 134. In FIG. 22, shaftfeature 40 (in the form of a channel) is formed by a break, or gap, inouter sheath layer 132.

FIG. 24 illustrates an example of shaft plug 76, which may form part ofa securement mechanism for securing grip sleeve 10 to shaft 14 (e.g.,securement mechanism 72 of FIG. 2). Shaft plug 76 may be configured tobe inserted into one end of shaft 14. In some examples, shaft plug 76includes a plurality of longitudinally-extending splits 136 thatfacilitate compression of shaft plug 76 when shaft plug 76 is insertedwithin a shaft (e.g., shaft 14). Such an arrangement may ensure afriction or interference fit between shaft plug 76 and shaft 14, suchthat shaft plug 76 may be fixed within shaft 14. Additionally oralternatively, shaft plug 76 may be adhered within shaft 14, integrallyformed with shaft 14, or otherwise coupled within shaft 14. Shaft plug76 includes a threaded hole 138 for engagement by a fastener (e.g.,fastener 78 of FIG. 2). Such fastener may be used to secure grip sleeve12 onto shaft 14, by engaging the fastener with grip sleeve 12 (e.g.,via sleeve collar 74 of FIG. 2) and engaging corresponding threads ofthe fastener within threaded hole 138 of shaft plug 76.

FIG. 25 illustrates examples of a kit 140 for retrofitting shaft 14 witha selectively removable grip sleeve 12 according to the presentdisclosure. Kits 140 include one or more grip assemblies 10 (e.g., oneor more grip sleeves 12, each with a respective grip liner 24 securedtherein), along with one or more corresponding shaft sheaths 64. Eachshaft sheath 64 selectively may be placed onto shaft 14 in order toassociate shaft feature 40 of shaft sheath 64 with the golf club shaft.Each shaft sheath 64 may include an alignment guide (e.g., alignmentguide 70 of FIG. 2) that is configured to facilitate proper alignment ofshaft sheath 64 with respect to shaft 14, and thus facilitate a desiredposition of shaft feature 38 with respect to shaft 14, such thatultimately the mating of liner feature 40 with shaft feature 38 resultsin a desired orientation of grip sleeve 12 with respect to shaft 14. Inexamples where shaft sheath 64 is an adhesive-backed film, shaft sheath64 may be adhered to the golf club shaft, thereby coupling shaft sheath64 (and the associated shaft feature 40) to the golf club shaft. Kits140 may be configured to retrofit existing golf clubs with a replaceablegrip sleeve according to the present disclosure, without substantiallyimpacting the weight of the golf club, in some examples. For example, afirst weight of the original golf club (e.g., with a conventional gripattached thereto) may be within less than 1% of a second weight of thesame golf club with grip assembly 10 secured thereto, in place of itsconventional grip.

In some examples, kit 140 includes one or more securement mechanisms 72for securing grip sleeves 12 to a golf club shaft. Kits 140 may includea plurality of identical grip sleeves 12, and/or kits 140 may include aplurality of different types of grip sleeves 12 (e.g., grip sleeves ofdifferent shape, sizes, and/or materials or textures). Similarly, kits140 may include a plurality of identical shaft sheaths 64, and/or kits140 may include a plurality of different types of shaft sheaths 64(e.g., with different types of shaft features 40, of different sizes,shapes, and/or materials, etc.).

While examples herein have been described in terms of grip assembliesfor golf clubs (e.g., replaceable grip sleeves for golf club shafts),presently disclosed grip assemblies may be configured for otherapplications as well. For example, presently disclosed grip assembliesmay be used as a hand grip or sports grip with any shock-impartingimplements and/or any recreational or industrial equipment, such asracquet handles, paddle handles, sports sticks (e.g., hockey, lacrosse,cricket, croquet, pool cues, walking, polo), bats, bicycle handles,weight machines, poles (e.g., ski, trekking), fishing rods, tools,firearms, or any other bars, handles, or shafts in any field.

FIGS. 26-27 schematically provide flowcharts that representillustrative, non-exclusive examples of methods 200 for replacing a gripsleeve on a shaft (FIG. 26) and methods 300 for constructing orassembling a selectively replaceable grip assembly for a shaft (FIG.27). In FIGS. 26-27, some steps are illustrated in dashed boxesindicating that such steps may be optional or may correspond to anoptional version of a method according to the present disclosure. Thatsaid, not all methods according to the present disclosure are requiredto include the steps illustrated in solid boxes. The methods and stepsillustrated in FIGS. 26-27 are not limiting and other methods and stepsare within the scope of the present disclosure, including methods havinggreater than or fewer than the number of steps illustrated, asunderstood from the discussions herein.

FIG. 26 illustrates methods 200 of replacing a grip sleeve on a shaft,which methods 200 generally include providing a grip assembly (e.g.,grip assembly 10) at 202 and positioning the grip sleeve of the gripassembly on the shaft (e.g., shaft 14), such as by inserting the shaftat least partially within an interior space of the grip sleeve (e.g.,interior space 18 of grip sleeve 12) at 204. Providing the grip assemblyat 202 may include providing one or more kits (e.g., kit 140) with agrip sleeve, grip liner, and shaft sheath for retrofitting aconventional golf club (or other shaft). In other examples, providingthe grip assembly at 202 includes providing a grip sleeve and grip linerfor use with a shaft that already includes a shaft feature associatedtherewith. Additionally or alternatively, providing the grip assembly at202 may include one or more steps of method 300 of constructing orassembling one or more grip assemblies.

Positioning the grip sleeve on the shaft at 204 includes examples ofselectively placing a removable grip sleeve according to the presentdisclosure onto a golf club shaft. Positioning the grip sleeve on theshaft at 204 is generally performed by hand, without the use ofcompressed air, solvents, or special tools. For example, one end of thegrip assembly may be placed onto one end of the shaft, such that a linerfeature of the grip liner (e.g., liner feature 38 of grip liner 24)engages the shaft feature associated with the shaft (e.g., shaft feature40). Grip sleeve 12 and the associated grip liner may then belongitudinally slid further onto the shaft until the shaft issufficiently inserted into the grip sleeve. In such positioning at 204,an inner liner surface of the grip liner (e.g., inner liner surface 50)may be longitudinally slid against an outer sheath surface of the shaftsheath (e.g., outer sheath surface 68) and/or against an outer shaftsurface of the shaft (e.g., outer shaft surface 66). As the gripassembly is positioned onto the shaft, the grip liner may be expandedtowards the expanded conformation, as the shaft exerts radial outwardforce onto the grip liner. This may especially be the case in exampleswhere the shaft is frustoconical, or otherwise tapered. In theseexamples, the grip assembly may be tapered as well, in order to conformto the shaft once applied. Thus, the smallest end of the grip assemblymust be inserted onto the largest end of the shaft in such examples,which is facilitated by expansion of the grip liner towards the expandedconformation.

In some methods 200, positioning the grip sleeve on the shaft at 204includes aligning a shaft sheath (e.g., shaft sheath 64) and/or the gripsleeve with respect to the shaft, such as by using an alignment guide(e.g., alignment guide 70). For example, an alignment guide may bevisible on the shaft or shaft sheath to serve as a reference point suchthat the shaft sheath and/or the grip sleeve can be positioned on theshaft in the desired orientation. Some methods 200 include securing thegrip sleeve to the shaft using a securement mechanism (e.g., securementmechanism 72) at 206.

The grip sleeve may be selectively removed from the shaft at 208, afterwhich the grip sleeve (or a different grip sleeve) may be positioned onthe shaft again at 204. In some methods 200, the securement mechanismmay be removed at 210 prior to removing the grip sleeve from the shaftat 208. The securement mechanism may again be secured at 206 afterplacement of another grip sleeve at 204. In this manner, the grip sleevemay be selectively removed from the shaft, such as when the grip sleeveis worn or damaged or when otherwise desired, without damaging the gripsleeve or shaft, and in a more timely fashion than conventionaltechniques of removing conventional grip sleeves.

Methods 300 of constructing, or assembling, a selectively replaceablegrip assembly for a shaft, are shown in FIG. 27. As noted above inconnection with FIG. 26, one or more steps of methods 300 may beperformed to provide the grip assembly at 202 for methods 200. Methods300 generally include providing a grip sleeve (e.g., grip sleeve 12) at302, and securing a grip liner (e.g., grip liner 24) to the grip sleeveat 304. Providing the grip sleeve at 302 may include providing any ofthe grip assemblies, components thereof, and/or kits disclosed herein.Securing the grip liner to the grip sleeve at 304 generally includessecuring the grip liner adjacent an inner grip surface (e.g., inner gripsurface 22) of the grip sleeve such that a portion of the grip liner isfixed with respect to the inner grip surface. Generally, only a portionof the grip liner (which may be substantially tubular in overall shapein the resting conformation) is fixed to the inner grip surface of thegrip sleeve, to allow for expansion of the grip liner towards theexpanded conformation while within the grip sleeve. Such expansion ofthe grip liner towards the expanded conformation may push outwardly onthe grip sleeve, aiding in positioning the grip assembly on the shaft.

Some methods 300 also include providing a shaft sheath (e.g., shaftsheath 64) and/or shaft feature (e.g., shaft feature 40) at 306. Forexample, providing the shaft sheath at 306 may include providing a shaftsheath including the shaft feature. Alternatively, providing the shaftfeature at 306 may include providing a shaft having a shaft featureassociated therewith, or providing a shaft feature that is configured tobe coupled to the shaft. Further, methods 300 may include applying theshaft sheath and/or shaft feature to the shaft at 308. For example,applying the shaft sheath at 308 may include coupling the shaft sheathto the shaft. Alternatively, applying the shaft feature at 308 mayinclude coupling the shaft feature to the shaft. Applying the shaftsheath and/or shaft feature at 308 may include adhering an inner sheathsurface (e.g., inner sheath surface 67 of shaft sheath 64) to the shaft.Applying the shaft sheath and/or shaft feature to the shaft at 308 maybe performed with respect to a conventional shaft, such as aconventional golf club shaft, so that the golf club shaft is compatiblewith presently disclosed grip assemblies. In some methods 300, providingthe grip sleeve at 302 further includes providing a securement mechanism(e.g., securement mechanism 72) configured to secure the grip sleeve tothe shaft via one or more fasteners or other components (e.g., sleevecollar 74 and/or shaft plug 76).

Illustrative, non-exclusive examples of grip assemblies, kits, golfclubs, and methods according to the present disclosure are presented inthe following enumerated paragraphs. It is within the scope of thepresent disclosure that an individual step of a method recited herein,including in the following enumerated paragraphs, may additionally oralternatively be referred to as a “step for” performing the recitedaction.

A1. A grip assembly, the grip assembly comprising:

-   -   a grip sleeve, wherein the grip sleeve defines an interior space        and is configured to be selectively positioned on a shaft such        that a portion of the shaft is within the interior space and        further configured to be selectively removed from the shaft,        wherein the grip sleeve comprises an outer grip surface for        engagement by a user and an inner grip surface opposite the        outer grip surface and that faces the interior space, and        wherein the grip sleeve is constructed of a resilient material;        and    -   a grip liner positioned adjacent the inner grip surface of the        grip sleeve, wherein the grip liner is substantially tubular in        overall shape, wherein at least a portion of the grip liner is        fixed to the inner grip surface of the grip sleeve, wherein the        grip liner is configured to radially expand, in response to an        outward radial force exerted on the grip liner, from a resting        conformation to an expanded conformation, and wherein the grip        liner comprises:        -   a discontinuity that extends longitudinally along a            longitudinal axis of the grip liner, wherein the            discontinuity facilitates radial expansion and contraction            of the grip liner between the resting conformation and the            expanded conformation; and        -   a liner feature that extends longitudinally along the            longitudinal axis of the grip liner, wherein the liner            feature is configured to mate with a corresponding shaft            feature associated with the shaft and restrict rotation of            the grip sleeve relative to the shaft when the shaft is            positioned within the interior space and when the liner            feature and the shaft feature are mated.

A1.1. The grip assembly of paragraph A1, wherein only a portion of thegrip liner is fixed to the inner grip surface of the grip sleeve.

A2. The grip assembly of paragraph A1 or A1.1, wherein one of the linerfeature and the shaft feature is a ridge, and the other of the linerfeature and the shaft feature is a channel.

A3. The grip assembly of any of paragraphs A1-A2, wherein the gripassembly is a grip assembly for a golf club and wherein the shaft is agolf club shaft.

A4. The grip assembly of any of paragraphs A1-A3, wherein the gripassembly is a grip assembly for a sports club or sports stick.

A5. The grip assembly of any of paragraphs A1-A4, wherein the shaft is ahandle for athletic equipment.

A6. The grip assembly of any of paragraphs A1-A5, wherein the gripassembly is configured to substantially prevent rotation of the gripsleeve with respect to the shaft when the grip sleeve is positioned onthe shaft.

A7. The grip assembly of any of paragraphs A1-A6, wherein thediscontinuity comprises a plurality of circumferentially spaced-apartdiscontinuities.

A8. The grip assembly of any of paragraphs A1-A7, wherein thediscontinuity comprises a longitudinal slit between a first portion anda second portion of the grip liner.

A8.1. The grip assembly of any of paragraphs A1-A8, wherein thediscontinuity extends from a first liner end of the grip liner to asecond liner end of the grip liner, the second liner end being oppositethe first liner end.

A8.2. The grip assembly of any of paragraphs A1-A8, wherein thediscontinuity extends only partially along a length between a firstliner end of the grip liner and a second liner end of the grip liner,the second liner end being opposite the first liner end.

A9. The grip assembly of any of paragraphs A1-A8.2, wherein the linerfeature is a single liner feature.

A10. The grip assembly of any of paragraphs A1-A9, wherein the linerfeature overlaps the discontinuity.

A11. The grip assembly of any of paragraphs A1-A9, wherein the linerfeature is circumferentially spaced apart from the discontinuity.

A12. The grip assembly of any of paragraphs A1-A11, wherein the linerfeature is a channel formed in the grip liner.

A13. The grip assembly of paragraph A12, wherein the channel is formedbetween spaced apart regions of overlap between a first layer and asecond layer of the grip liner.

A14. The grip assembly of any of paragraphs A12 or A13, wherein thechannel is formed by a decreased thickness portion of the grip liner.

A15. The grip assembly of any of paragraphs A1-A11, wherein the linerfeature is a ridge extending from the grip liner.

A16. The grip assembly of paragraph A15, wherein the ridge is formed bya region of overlap between a first layer and a second layer of the gripliner.

A17. The grip assembly of paragraph A15 or A16, wherein the ridge isformed by an increased thickness portion of the grip liner.

A18. The grip assembly of any of paragraphs A1-A17, wherein the gripliner comprises an outer liner surface opposite an inner liner surface,wherein at least a portion of the outer liner surface is coupled to theinner grip surface of the grip sleeve, and wherein the liner feature isformed or positioned on the inner liner surface of the grip liner.

A19. The grip assembly of any of paragraphs A1-A18, wherein the linerfeature is tapered such that a liner feature width of the liner featurecontinuously decreases between a first liner feature end and a secondliner feature end opposite the first liner feature end.

A19.1. The grip assembly of paragraph A19, wherein the first linerfeature end corresponds with a/the first liner end, and wherein thesecond liner feature end corresponds with a/the second liner end.

A20. The grip assembly of any of paragraphs A1-A19.1, wherein the gripliner is integrally formed with the grip sleeve.

A21. The grip assembly of any of paragraphs A1-A19.1, wherein the gripliner is adhered to the inner grip surface of the grip sleeve via anadhesive such that the adhesive allows expansion of the grip liner tothe expanded conformation.

A22. The grip assembly of any of paragraphs A1-A21, wherein the gripliner comprises a/the first layer and a/the second layer.

A23. The grip assembly of paragraph A22, wherein an/the adhesive isapplied to only one of the first layer and the second layer, to adherethe grip liner to the inner grip surface of the grip sleeve.

A24. The grip assembly of any of paragraphs A1-A23, wherein the gripliner comprises a semi-rigid or rigid material.

A25. The grip assembly of any of paragraphs A1-A24, wherein the gripliner comprises a shape memory material.

A26. The grip assembly of any of paragraphs A1-A25, wherein the gripliner comprises polyethylene terephthalate (PET), polyethylene (PE),polypropylene (PP), polyvinyl chloride (PVC), and/or polyethyleneterephthalate glycol-modified (PETG).

A27. The grip assembly of any of paragraphs A1-A26, wherein the gripliner comprises a liner material that biases the grip liner toward theresting conformation.

A28. The grip assembly of any of paragraphs A1-A27, wherein the gripliner extends along substantially an entire sleeve length of the gripsleeve, from within a butt end region of the grip sleeve to within atapered end region of the grip sleeve, the tapered end region beingopposite the butt end region.

A29. The grip assembly of any of paragraphs A1-A27, wherein the gripliner extends along a portion of a sleeve length of the grip sleeve.

A30. The grip assembly of any of paragraphs A1-A29, wherein the shaftfeature is tapered such that a shaft feature width of the shaft featurecontinuously decreases between a first shaft feature end and a secondshaft feature end opposite the first shaft feature end.

A31. The grip assembly of any of paragraphs A1-A30, wherein the shaftfeature is a single shaft feature.

A32. The grip assembly of any of paragraphs A1-A31, wherein the shaftfeature comprises a channel.

A33. The grip assembly of any of paragraphs A1-A31, wherein the shaftfeature comprises a ridge.

A34. The grip assembly of any of paragraphs A1-A33, wherein the shaftfeature is integrally formed with the shaft.

A35. The grip assembly of paragraph A34, wherein the shaft feature isformed by a decreased thickness portion of the shaft.

A36. The grip assembly of paragraph A34, wherein the shaft feature isformed by an increased thickness portion of the shaft.

A37. The grip assembly of any of paragraphs A1-A33, further comprising ashaft sheath comprising the shaft feature.

A38. The grip assembly of paragraph A37, wherein the shaft feature isformed by a region of overlap between a first layer and a second layerof the shaft sheath.

A39. The grip assembly of any of paragraphs A37 or A38, wherein theshaft feature is formed between spaced apart regions of overlap betweena/the first layer and a/the second layer of the shaft sheath.

A40. The grip assembly of any of paragraphs A37-A39, wherein the shaftfeature is formed by a decreased thickness portion of the shaft sheath.

A41. The grip assembly of any of paragraphs A37-A39, wherein the shaftfeature is formed by an increased thickness portion of the shaft sheath.

A42. The grip assembly of any of paragraphs A37-A41, wherein the shaftsheath is positioned adjacent the shaft such that an inner sheathsurface is coupled to the shaft.

A43. The grip assembly of any of paragraphs A37-A42, wherein the shaftsheath is positioned interiorly to the grip sleeve when the grip sleeveis positioned on the shaft.

A44. The grip assembly of any of paragraphs A37-A43, wherein the shaftsheath comprises an adhesive-backed film.

A45. The grip assembly of any of paragraphs A37-A44, wherein the shaftfeature is provided on an outer sheath surface of the shaft sheath, theouter sheath surface being opposite an/the inner sheath surface.

A46. The grip assembly of any of paragraphs A37-A45, wherein the shaftsheath has a thickness of less than about 0.001 inches, less than about0.01 inches, less than about 0.025 inches, and/or less than about 0.1inches.

A47. The grip assembly of any of paragraphs A37-A46, wherein the shaftsheath is flexible such that it is configured to conform to the shaft.

A48. The grip assembly of any of paragraphs A37-A41 wherein the shaftsheath is integrally formed with the shaft.

A49. The grip assembly of any of paragraphs A37-A48, wherein the shaftsheath further comprises an alignment guide for aligning the shaftsheath with the shaft.

A50. The grip assembly of paragraph A49, wherein the alignment guide isencapsulated between layers of the shaft sheath.

A51. The grip assembly of any of paragraphs A37-A50, wherein the shaftsheath comprises ultra-high molecular weight polyethylene (UHMW PE).

A52. The grip assembly of any of paragraphs A37-A51, wherein the shaftsheath comprises a material selected to limit friction between an/theouter sheath surface and the inner liner surface of the grip liner.

A52.1. The grip assembly of paragraph A52, wherein a coefficient offriction between the outer sheath surface and the inner liner surface isless than 0.7, less than 0.5, less than 0.4, less than 0.3, less than0.2, less than 0.1, and/or less than 0.05.

A53. The grip assembly of any of paragraphs A37-A52.1, wherein a shaftsheath material of which the shaft sheath is composed is different froma grip liner material of which the grip liner is composed.

A54. The grip assembly of any of paragraphs A1-A53, wherein the shaftfeature is rectangular.

A55. The grip assembly of any of paragraphs A1-A53, wherein the shaftfeature is wedge-shaped.

A56. The grip assembly of any of paragraphs A1-A55, wherein the shaftfeature extends longitudinally and circumferentially.

A57. The grip assembly of any of paragraphs A1-A56, further comprising asecurement mechanism configured to secure the grip sleeve to the shaft.

A58. The grip assembly of paragraph A57, wherein the securementmechanism comprises a sleeve collar associated with the grip sleeve.

A59. The grip assembly of paragraph A58, wherein the sleeve collar isrigid and positioned within a/the butt end region of the grip sleeve.

A60. The grip assembly of any of paragraphs A57-A59, wherein thesecurement mechanism comprises a threaded shaft plug positioned andsecured within the shaft.

A61. The grip assembly of any of paragraphs A57-A60, wherein a/thesleeve collar of the securement mechanism is configured to engage a/thethreaded shaft plug within the shaft via a fastener positioned througha/the sleeve collar and the threaded shaft plug, and wherein thesecurement mechanism further comprises the fastener.

A62. The grip assembly of any of paragraphs A57-A61, wherein a/thethreaded shaft plug comprises a plurality of longitudinally-extendingsplits.

A63. The grip assembly of any of paragraphs A57-A62, wherein a/thethreaded shaft plug is configured to be compressed by the shaft when thethreaded shaft plug is positioned within the shaft, thereby ensuring afriction fit within the shaft such that the threaded shaft plug is fixedwithin the shaft.

A64. The grip assembly of any of paragraphs A1-A63, wherein the shaft isfrustoconical.

A65. The grip assembly of any of paragraphs A1-A64, wherein the gripsleeve is configured to be selectively positioned on a second shaftafter it is selectively removed from the shaft.

A66. The grip assembly of any of paragraphs A1-A65, wherein the gripsleeve is configured to be selectively re-placed on the shaft after itis selectively removed from the shaft.

A67. The grip assembly of any of paragraphs A1-A66, wherein the gripassembly is configured such that the grip sleeve is undamaged afterselective removal from the shaft.

A68. The grip assembly of any of paragraphs A1-A67, wherein the gripsleeve is configured to be selectively positioned on and removed fromthe shaft by hand, without the use of compressed air, special tools, orsolvents.

A69. The grip assembly of any of paragraphs A1-A68, wherein the gripsleeve comprises an elastic material.

A70. The grip assembly of any of paragraphs A1-A69, wherein the gripsleeve is configured to direct a force radially inward towards the shaftwhen the grip sleeve is positioned on the shaft.

A71. The grip assembly of any of paragraphs A1-A70, wherein the gripsleeve is tapered such that a first grip sleeve diameter at a/the buttend region of the grip sleeve is larger than a second grip sleevediameter at a/the tapered end region of the grip sleeve.

A72. The grip assembly of any of paragraphs A1-A71, further comprisingthe shaft.

A73. The grip assembly of any of paragraphs A1-A72, wherein an/the innergrip surface of the grip sleeve is tapered to correspond to the shaft,such that the inner grip surface has a non-constant inner diameter, andwherein an/the outer grip surface of the grip sleeve is not tapered,such that it has a substantially constant diameter along a/the sleevelength of the grip sleeve.

B1. A kit for retrofitting a golf club shaft of a golf club with aselectively removable grip sleeve, the kit comprising:

the grip assembly of any of paragraphs A1-A73; and

a/the shaft sheath configured to be positioned between the grip sleeveand the golf club shaft, wherein the shaft sheath is configured to bepositioned adjacent the golf club shaft such that an/the inner sheathsurface is coupled to the golf club shaft, wherein the shaft feature isprovided on an/the outer sheath surface of the shaft sheath, the outersheath surface being opposite the inner sheath surface.

B2. The kit of paragraph B1, wherein the kit is configured such thatwhen the shaft feature of the shaft sheath is engaged with the linerfeature of the grip liner, the grip sleeve is substantially preventedfrom rotating with respect to the golf club shaft.

B3. The kit of any of paragraphs B1-B2, wherein the kit is configuredsuch that a first weight of the golf club having a conventional gripsecured thereto is within less than 1% of a second weight of the golfclub having the grip assembly and shaft sheath secured thereto.

B4. The kit of any of paragraphs B1-B3, further comprising a/thesecurement mechanism configured to secure the grip sleeve to the golfclub shaft.

B5. The kit of any of paragraphs B1-B4, wherein the kit comprises aplurality of different grip sleeves, each of the plurality of differentgrip sleeves being configured to be selectively positioned on andremoved from the golf club shaft via engagement with the shaft sheath onthe golf club shaft.

B6. The kit of paragraph B5, wherein each respective grip sleeve of theplurality of different grip sleeves comprises a respective grip liner atleast partially fixed within the respective grip sleeve.

B7. The kit of any of paragraphs B1-B6, wherein the shaft sheathcomprises a plurality of shaft sheaths each configured to be positionedon a respective golf club shaft.

C1. A golf club, comprising:

the grip assembly of any of paragraphs A1-A73; and

a/the golf club shaft, wherein the shaft feature is associated with thegolf club shaft, wherein the grip sleeve is positioned on the golf clubshaft such that a portion of the golf club shaft is within the interiorspace defined by the grip sleeve and such that the liner feature of thegrip assembly is engaged with the shaft feature, and wherein the gripliner is positioned adjacent the inner grip surface of the grip sleeve.

C2. The golf club of paragraph C1, wherein the golf club shaft comprisesa/the shaft sheath.

C3. The golf club of any of paragraphs C1-C2, wherein a/the inner sheathsurface of a/the shaft sheath is positioned on the golf club shaft, anda/the outer surface of the shaft sheath is engaged with an/the innerliner surface of the grip liner.

C4. The golf club of any of paragraphs C1-C3, wherein a/the shaft sheathis integrally formed with the golf club shaft.

C5. The golf club of any of paragraphs C1-C4, wherein a/the shaft sheathis coupled to the golf club shaft.

C6. The golf club of any of paragraphs C1-05, wherein the shaft featureis integrally formed with the golf club shaft.

C7. The golf club of any of paragraphs C1-C6, wherein a/the shaft sheathcomprises the shaft feature.

C8. The golf club of any of paragraphs C1-C7, wherein the grip assemblyis secured to the golf club shaft via a/the securement mechanism.

C9. The golf club of any of paragraphs C1-C8, wherein the golf clubshaft is frustoconical.

D1. A method of replacing a grip sleeve on a shaft, the methodcomprising:

-   -   providing the grip assembly of any of paragraphs A1-A73; and    -   positioning the grip sleeve on the shaft.

D2. The method of paragraph D1, wherein the positioning the grip sleeveon the shaft comprises positioning the grip sleeve on a golf club shaftof a golf club.

D3. The method of any of paragraphs D1-D2, wherein the providing thegrip assembly comprises providing the kit of any of paragraphs B1-B7.

D4. The method of any of paragraphs D1-D3, wherein the providing thegrip assembly comprises providing a golf club shaft comprising the gripassembly of any of paragraphs A1-A73.

D5. The method of any of paragraphs D1-D4, wherein the positioning thegrip sleeve is performed by hand, without the use of compressed air orsolvents.

D6. The method of any of paragraphs D1-D5, wherein the positioning thegrip sleeve comprises engaging the liner feature of the grip liner withthe shaft feature of the shaft.

D7. The method of any of paragraphs D1-D6, wherein the positioning thegrip sleeve comprises longitudinally sliding the grip sleeve withrespect to the shaft.

D8. The method of any of paragraphs D1-D7, wherein the positioning thegrip sleeve comprises sliding an/the inner liner surface of the gripliner against an/the outer sheath surface of a/the shaft sheath.

D9. The method of any of paragraphs D1-D8, wherein the positioning thegrip sleeve comprises expanding the grip liner towards the expandedconformation.

D10. The method of any of paragraphs D1-D9, further comprising aligningthe grip sleeve with respect to the shaft.

D11. The method of paragraph D10, wherein the aligning the grip sleevecomprises aligning the grip sleeve using an/the alignment guide of a/theshaft sheath.

D12. The method of any of paragraphs D1-D11, further comprising removingthe grip sleeve from the shaft.

D13. The method of paragraph D12, further comprising removing a/thesecurement mechanism prior to the removing the grip sleeve from theshaft.

D14. The method of any of paragraphs D1-D13, further comprisingpositioning a second grip sleeve on the shaft.

D15. The method of any of paragraphs D1-D14, further comprising securingthe grip sleeve to the shaft using a/the securement mechanism.

E1. A method of constructing a selectively replaceable grip assembly fora shaft, the method comprising:

providing a grip sleeve, wherein the grip sleeve defines an interiorspace and is configured to be selectively positioned on the shaft suchthat a portion of the shaft is within the interior space and is furtherconfigured to be selectively removed from the shaft, wherein the gripsleeve comprises an outer grip surface for engagement by a user and aninner grip surface opposite the outer grip surface and that faces theinterior space, and wherein the grip sleeve is constructed of aresilient material; and

securing a grip liner adjacent the inner grip surface of the grip sleevesuch that at least a portion of the grip liner is fixed with respect tothe inner grip surface of the grip sleeve, wherein the grip liner issubstantially tubular in overall shape, wherein only a portion of thegrip liner is fixed to the inner grip surface of the grip sleeve,wherein the grip liner is configured to radially expand, in response toan outward radial force exerted on the grip liner, from a restingconformation to an expanded conformation, and wherein the grip linercomprises:

-   -   a discontinuity that extends longitudinally along a longitudinal        axis of the grip liner, wherein the discontinuity facilitates        radial expansion and contraction of the grip liner between the        resting conformation and the expanded conformation; and    -   a liner feature that extends longitudinally along the        longitudinal axis of the grip liner, wherein the liner feature        is configured to mate with a corresponding shaft feature        associated with the shaft and restrict rotation of the grip        sleeve relative to the shaft when the shaft is positioned within        the interior space and when the liner feature and the shaft        feature are mated.

E2. The method of paragraph E1, wherein the shaft is a golf club shaftof a golf club.

E3. The method of any of paragraphs E1-E2, further comprising providinga shaft sheath comprising the shaft feature.

E4. The method of paragraph E3, further comprising applying the shaftsheath to the shaft.

E4.1. The method of paragraph E4, wherein the applying the shaft sheathto the shaft comprises aligning the shaft sheath with respect to theshaft using an alignment guide of the shaft sheath.

E5. The method of paragraph E4 or E4.1, wherein the applying the shaftsheath to the shaft comprises applying the shaft sheath to aconventional golf club shaft to retrofit the conventional golf clubshaft with the selectively replaceable grip assembly.

E6. The method of any of paragraphs E4-E5, wherein the shaft sheath isan adhesive-backed film, and wherein the applying the shaft sheath tothe shaft comprises adhering an inner sheath surface to the shaft.

E7. The method of any of paragraphs E3-E6 wherein the providing theshaft sheath comprises providing a golf club shaft comprising the shaftsheath.

E8. The method of any of paragraphs E1-E7, further comprising:

providing a securement mechanism; and

securing the grip sleeve to the shaft via the securement mechanism.

E9. The method of any of paragraphs E1-E8, wherein the providing thegrip sleeve comprises providing the grip assembly of any of paragraphsA1-A73.

E10. The method of any of paragraphs E1-E9, wherein the providing thegrip sleeve comprises providing the kit of any of paragraphs B1-B7.

F1. A shaft sheath configured for use on a shaft to engage a selectivelyremovable and replaceable grip sleeve of a grip assembly.

F2. The shaft sheath of paragraph F1, wherein the grip assembly is thegrip assembly of any of paragraphs A1-A73.

F3. The shaft sheath of any of paragraphs F1-F2, wherein the shaftsheath comprises a/the shaft feature configured to mate with acorresponding liner feature of the grip assembly, wherein the shaftfeature extends longitudinally along a longitudinal axis of the shaftsheath, and wherein the shaft feature is configured to restrict rotationof the grip sleeve relative to the shaft when the liner feature and theshaft feature are mated.

F4. The shaft sheath of any of paragraphs F1-F3, wherein the shaftfeature is formed by a region of overlap between a first layer and asecond layer of the shaft sheath.

F5. The shaft sheath of any of paragraphs F1-F4, wherein the shaftfeature is formed between spaced apart regions of overlap between a/thefirst layer and a/the second layer of the shaft sheath.

F6. The shaft sheath of any of paragraphs F1-F5, wherein the shaftfeature is formed by a decreased thickness portion of the shaft sheath.

F7. The shaft sheath of any of paragraphs F1-F5, wherein the shaftfeature is formed by an increased thickness portion of the shaft sheath.

F8. The shaft sheath of any of paragraphs F1-F7, wherein the shaftsheath is configured to be positioned adjacent the shaft such that aninner sheath surface of the shaft sheath is coupled to the shaft.

F9. The shaft sheath of any of paragraphs F1-F8, wherein the shaftsheath is configured to be positioned interiorly to the grip sleeve whenthe grip sleeve is positioned on the shaft.

F10. The shaft sheath of any of paragraphs F1-F9, wherein the shaftsheath comprises an adhesive-backed film.

F11. The shaft sheath of any of paragraphs F1-F10 wherein a/the shaftfeature is provided on an outer sheath surface of the shaft sheath, theouter sheath surface being opposite an/the inner sheath surface of theshaft sheath.

F12. The shaft sheath of any of paragraphs F1-F11, wherein the shaftsheath is flexible such that it is configured to conform to the shaft.

F13. The shaft sheath of any of paragraphs F1-F12, wherein the shaftsheath further comprises an alignment guide for aligning the shaftsheath with the shaft.

F14. The shaft sheath of paragraph F13, wherein the alignment guide isencapsulated between layers of the shaft sheath.

F15. The shaft sheath of any of paragraphs F1-F14, wherein the shaftsheath comprises ultra-high molecular weight polyethylene (UHMW PE).

F16. The shaft sheath of any of paragraphs F1-F15, wherein the shaftsheath comprises a material selected to limit friction between an/theouter sheath surface and a/the grip liner of the grip assembly.

G1. A grip assembly, comprising:

a grip sleeve, wherein the grip sleeve defines an interior space and isconfigured to be selectively positioned on a shaft such that a portionof the shaft is within the interior space and further configured to beselectively removed from the shaft, wherein the grip sleeve comprises anouter grip surface for engagement by a user and an inner grip surfaceopposite the outer grip surface and that faces the interior space, andwherein the grip sleeve is constructed of a resilient material; and

a grip liner positioned adjacent the inner grip surface of the gripsleeve, wherein the grip liner is substantially tubular in overall shapeand has a first liner end and a second liner end longitudinally oppositethe first liner end, wherein at least a portion of the grip liner isfixed to the inner grip surface of the grip sleeve, wherein the gripliner is configured to radially expand, in response to an outward radialforce exerted on the grip liner, from a resting conformation to anexpanded conformation, and wherein the grip liner comprises:

-   -   an inner layer having a first elongate slit separating an inner        layer first portion and an inner layer second portion; and    -   an outer layer radially outward from the inner layer and having        a second elongate slit spaced-away from the first elongate slit;    -   wherein the inner layer first portion is fixed to the outer        layer on one side of the second elongate slit and is permitted        to slide relative to the outer layer on an opposite side of the        second elongate slit, and wherein the inner layer second portion        is fixed to the outer layer;    -   wherein the inner layer and the outer layer collectively define        a channel between the inner layer first portion and the inner        layer second portion, wherein the channel extends longitudinally        along the grip liner from the second liner end toward the first        liner end, wherein the channel is spaced-away from the first        elongate slit, wherein the channel is configured to mate with a        corresponding ridge associated with the shaft and restrict        rotation of the grip sleeve relative to the shaft when the shaft        is positioned within the interior space and when the channel and        the ridge are mated, and wherein the channel is configured to        initially mate with the ridge at the second liner end as the        shaft is selectively positioned within the interior space of the        grip sleeve; and    -   wherein the first elongate slit, the second elongate slit, and a        region of overlap between the outer layer and the inner layer        first portion on the opposite side of the second elongate slit        collectively define a discontinuity that permits the grip liner        to transition between the resting conformation and the expanded        conformation by permitting the inner layer first portion to        slide relative to the outer layer and by permitting widths of        the first elongate slit and the second elongate slit to expand        toward the expanded conformation and contract toward the resting        conformation.

G2. The grip assembly of paragraph G1, wherein the grip assembly isconfigured to substantially prevent rotation of the grip sleeve withrespect to the shaft when the grip sleeve is positioned on the shaft.

G3. The grip assembly of any of paragraphs G1-G2, wherein the outerlayer of the grip liner comprises an outer liner surface, and whereinonly a portion of the outer liner surface is fixed to the inner gripsurface of the grip sleeve.

G4. The grip assembly of any of paragraphs G1-G3,

wherein the channel is tapered such that a channel width of the channelcontinuously decreases from a second channel end at the second liner endto a first channel end toward the first liner end opposite the secondliner end; and

wherein the ridge is tapered such that a ridge width of the ridgecontinuously decreases from a first ridge end to a second ridge endopposite the first ridge end, and wherein when the channel is mated withthe ridge, the first ridge end is adjacent the second channel end andthe second ridge end is adjacent the first channel end.

G5. The grip assembly of any of paragraphs G1-G4, wherein the grip linercomprises a semi-rigid or rigid material.

G6. The grip assembly of any of paragraphs G1-G5, further comprising theshaft and a shaft sheath, wherein the shaft sheath comprises the ridge,wherein the shaft sheath is conformed to an outer shaft surface of theshaft.

G7. The grip assembly of paragraph G6, wherein the shaft sheath is anadhesive-backed film.

G8. The grip assembly of any of paragraphs G6-G7, wherein the shaftsheath further comprises an alignment guide for aligning the shaftsheath with the shaft when adhering the shaft sheath to the shaft,wherein the alignment guide is encapsulated between layers of the shaftsheath, and wherein the alignment guide provides a visual guide foralignment of the channel with the ridge when a user is initiallyinstalling the grip assembly on the shaft.

G9. The grip assembly of any of paragraphs G1-G8, further comprising asecurement mechanism configured to secure the grip sleeve to the shaft,wherein the securement mechanism comprises a sleeve collar associatedwith the grip sleeve, wherein the sleeve collar is rigid and positionedwithin a butt end region of the grip sleeve, wherein the securementmechanism comprises a threaded shaft plug positioned and secured withinthe shaft, and wherein the sleeve collar of the securement mechanism isconfigured to engage the threaded shaft plug within the shaft via afastener positioned through the sleeve collar and the threaded shaftplug, and wherein the securement mechanism further comprises thefastener.

H1. A kit for retrofitting a golf club shaft of a golf club, the kitcomprising:

the grip assembly of any of paragraphs G1-G9; and

a/the shaft sheath, wherein the shaft sheath is an/the adhesive-backedfilm that comprises the ridge and is configured to be adhered andconform to an outer shaft surface of the golf club shaft.

I1. A kit for retrofitting a golf club shaft of a golf club, the kitcomprising:

two or more of the grip assembly of any of paragraphs G1-G9; and

at least one shaft sheath, wherein the shaft sheath is an/theadhesive-backed film that comprises the ridge and is configured to beadhered and conform to an outer shaft surface of the golf club shaft;

wherein each grip assembly is configured to be selectively positioned onand removed from the golf club shaft via engagement with the shaftsheath when adhered to the golf club shaft.

I2. The kit of paragraph I1, wherein the shaft sheath comprises aplurality of shaft sheaths each configured to be positioned on arespective golf club shaft.

J1. A golf club, comprising:

the grip assembly of any of paragraphs G1-G9;

the shaft, wherein the shaft is a golf club shaft of the golf club,wherein a butt end of the shaft is positioned within the interior spaceof the grip sleeve, and wherein the ridge is mated with the channel; and

a golf club head coupled to the shaft opposite the butt end of theshaft.

J2. The golf club of paragraph J1, wherein the shaft is at leastpartially frustoconical with a diameter that is greatest toward the buttend of the shaft.

K1. A golf club, comprising:

a shaft having a butt end region and a head end region opposite the buttend region, wherein the shaft comprises a shaft feature that extendslongitudinally along at least a portion of the butt end region of theshaft;

a head coupled to the shaft at a terminal end of the head end region ofthe shaft; and

a grip assembly positioned over the butt end region of the shaft,wherein the grip assembly is configured to be selectively removed fromthe shaft, and wherein the grip assembly comprises:

-   -   a grip sleeve, wherein the grip sleeve defines an interior        space, wherein the butt end region of the shaft is positioned        within the interior space, wherein the grip sleeve comprises an        outer grip surface for engagement by a user and an inner grip        surface opposite the outer grip surface and that faces the        interior space, and wherein the grip sleeve is constructed of a        resilient material; and    -   a grip liner positioned adjacent the inner grip surface of the        grip sleeve, wherein the grip liner is substantially tubular in        overall shape, wherein only a portion of the grip liner is fixed        to the inner grip surface of the grip sleeve, wherein the grip        liner is configured to radially expand in response to an outward        radial force exerted on the grip liner from a resting        conformation to an expanded conformation, and to radially        contract in response to removal of the outward radial force from        the expanded conformation toward the resting conformation, and        wherein the grip liner comprises:        -   a discontinuity that extends longitudinally along the grip            liner, wherein the discontinuity facilitates radial            expansion and contraction of the grip liner between the            resting conformation and the expanded conformation; and        -   a liner feature that extends longitudinally along the grip            liner and is mated with the shaft feature, wherein the liner            feature aligns the grip sleeve relative to the shaft,            wherein the liner feature restricts rotation of the grip            sleeve relative to the shaft, and wherein one of the liner            feature or the shaft feature is a ridge and the other of the            liner feature or the shaft feature is a channel.

K2. The golf club of paragraph K1, wherein the discontinuity comprisesat least one longitudinal slit between a first portion and a secondportion of the grip liner.

K3. The golf club of any of paragraphs K1-K2, wherein the liner featureis a single liner feature and the shaft feature is a single shaftfeature.

K4. The golf club of any of paragraphs K1-K3, wherein the shaft featureis the ridge, wherein the liner feature is the channel, and wherein thechannel is defined between spaced apart regions of overlap between aninner layer and an outer layer of the grip liner.

K5. The golf club of any of paragraphs K1-K3, wherein the shaft featureis the channel, wherein the liner feature is the ridge, and wherein theridge is formed by a region of overlap between an inner layer and anouter layer of the grip liner.

K6. The golf club of any of paragraphs K1-K5,

wherein the liner feature is tapered such that a liner feature width ofthe liner feature continuously decreases from one longitudinal end ofthe liner feature to an opposite longitudinal end of the liner feature;and

wherein the shaft feature is tapered such that a shaft feature width ofthe shaft feature continuously decreases from one longitudinal end ofthe shaft feature to an opposite longitudinal end of the shaft feature.

K7. The golf club of any of paragraphs K1-K6, wherein the grip liner iscomposed of a semi-rigid or rigid material.

K8. The golf club of any of paragraphs K1-K7, wherein the shaftcomprises a shaft core and a shaft sheath, wherein the shaft sheathcomprises the shaft feature, wherein the shaft sheath is coupled andconformed to the shaft core within the butt end region of the shaft.

K9. The golf club of paragraph K8, wherein the shaft sheath comprises anadhesive-backed film that is adhered to the shaft core within the buttend region of the shaft.

K10. The golf club of any of paragraphs K8-K9, wherein the shaft sheathfurther comprises an alignment guide for aligning the shaft sheath withthe shaft core when adhering the shaft sheath to the shaft core, whereinthe alignment guide is encapsulated between layers of the shaft sheath,and wherein the alignment guide provides a visual guide for alignment ofthe liner feature with the shaft feature when a user is initiallyinstalling the grip assembly on the shaft.

K11. The golf club of any of paragraphs K1-K10, further comprising asecurement mechanism that secures the grip sleeve to the shaft, whereinthe securement mechanism comprises:

a sleeve collar at a butt end of the grip sleeve;

a threaded shaft plug positioned and secured within the butt end regionof the shaft; and

a fastener, wherein the fastener extends through the sleeve collar andmates with the threaded shaft plug.

K12. The golf club of any of paragraphs K1-K4 or K6-K11,

wherein the liner feature is the channel and the shaft feature is theridge;

wherein the grip liner comprises an inner layer having a first elongateslit separating an inner layer first portion and an inner layer secondportion;

wherein the grip liner further comprises an outer layer radially outwardfrom the inner layer and having a second elongate slit spaced-away fromthe first elongate slit;

wherein the inner layer first portion is fixed to the outer layer on oneside of the second elongate slit and is permitted to slide relative tothe outer layer on an opposite side of the second elongate slit, andwherein the inner layer second portion is fixed to the outer layer;

wherein the inner layer and the outer layer collectively define thechannel between the inner layer first portion and the inner layer secondportion, wherein the channel extends longitudinally along the gripliner, wherein the channel is spaced-away from the first elongate slit;and

wherein the first elongate slit, the second elongate slit, and a regionof overlap between the outer layer and the inner layer first portion onthe opposite side of the second elongate slit collectively define thediscontinuity to permit the grip liner to transition between the restingconformation and the expanded conformation by permitting the inner layerfirst portion to slide relative to the outer layer and by permittingwidths of the first elongate slit and the second elongate slit to expandtoward the expanded conformation and contract toward the restingconformation.

K13. The golf club of any of paragraphs K1-K12, wherein the shaft is atleast partially frustoconical within the butt end region with a diameterthat is greatest away from the head end region of the shaft.

L1. A kit for retrofitting a shaft of a golf club, the kit comprising:

a shaft sheath comprising an adhesive-backed film for being adhered andconformed to a butt end region of the shaft, wherein the shaft sheathcomprises a shaft feature;

a grip assembly configured to be selectively positioned over and removedfrom the butt end region of the shaft and the shaft sheath when theshaft sheath is adhered and conformed to the butt end region of theshaft, wherein the grip assembly comprises:

-   -   a grip sleeve, wherein the grip sleeve defines an interior space        sized to receive the butt end region of the shaft, wherein the        grip sleeve comprises an outer grip surface for engagement by a        user and an inner grip surface opposite the outer grip surface        and that faces the interior space, and wherein the grip sleeve        is constructed of a resilient material; and    -   a grip liner positioned adjacent the inner grip surface of the        grip sleeve, wherein the grip liner is substantially tubular in        overall shape, wherein only a portion of the grip liner is fixed        to the inner grip surface of the grip sleeve, wherein the grip        liner is configured to radially expand in response to an outward        radial force exerted on the grip liner from a resting        conformation to an expanded conformation, and to radially        contract in response to removal of the outward radial force and        due to the resiliency of the grip sleeve from the expanded        conformation toward the resting conformation, and wherein the        grip liner comprises:        -   a discontinuity that extends longitudinally along the grip            liner, wherein the discontinuity permits radial expansion            and contraction of the grip liner between the resting            conformation and the expanded conformation; and        -   a liner feature that extends longitudinally along the grip            liner and is configured to mate with the shaft feature when            the shaft sheath is adhered and conformed to the butt end            region of the shaft to restrict rotation of the grip sleeve            relative to the shaft, and wherein one of the liner feature            or the shaft feature is a ridge and the other of the liner            feature or the shaft feature is a channel.

L2. The kit of paragraph L1, wherein the discontinuity comprises atleast one longitudinal slit between a first portion and a second portionof the grip liner.

L3. The kit of any of paragraphs L1-L2, wherein the liner feature is asingle liner feature and the shaft feature is a single shaft feature.

L4. The kit of any of paragraphs L1-L3, wherein the shaft feature is theridge, wherein the liner feature is the channel, and wherein the channelis defined between spaced apart regions of overlap between an innerlayer and an outer layer of the grip liner.

L5. The kit of any of paragraphs L1-L3, wherein the shaft feature is thechannel, wherein the liner feature is the ridge, and wherein the ridgeis formed by a region of overlap between an inner layer and an outerlayer of the grip liner.

L6. The kit of any of paragraphs L1-L5,

wherein the liner feature is tapered such that a liner feature width ofthe liner feature continuously decreases from one longitudinal end ofthe liner feature to an opposite longitudinal end of the liner feature;and

wherein the shaft feature is tapered such that a shaft feature width ofthe shaft feature continuously decreases from one longitudinal end ofthe shaft feature to an opposite longitudinal end of the shaft feature.

L7. The kit of any of paragraphs L1-L6, wherein the grip liner iscomposed of a semi-rigid or rigid material.

L8. The kit of any of paragraphs L1-L7, wherein the shaft sheath furthercomprises an alignment guide for aligning the shaft sheath with theshaft when adhering the shaft sheath to the shaft, wherein the alignmentguide is encapsulated between layers of the shaft sheath, and whereinthe alignment guide provides a visual guide for alignment of the linerfeature with the shaft feature when a user is initially installing thegrip assembly on the shaft.

L9. The kit of any of paragraphs L1-L8,

wherein the grip assembly further comprises a sleeve collar at a buttend of the grip sleeve; and

wherein the kit further comprises:

-   -   a threaded shaft plug configured to be positioned and secured        within the butt end region of the shaft; and    -   a fastener configured to extend through the sleeve collar and        mate with the threaded shaft plug when positioned and secured        within the butt end region of the shaft to secure the grip        assembly to the shaft.

L10. The kit of any of paragraphs L1-L4 or L6-L9,

wherein the liner feature is the channel and the shaft feature is theridge;

wherein the grip liner comprises an inner layer having a first elongateslit separating an inner layer first portion and an inner layer secondportion;

wherein the grip liner further comprises an outer layer radially outwardfrom the inner layer and having a second elongate slit spaced-away fromthe first elongate slit;

wherein the inner layer first portion is fixed to the outer layer on oneside of the second elongate slit and is permitted to slide relative tothe outer layer on an opposite side of the second elongate slit, andwherein the inner layer second portion is fixed to the outer layer;

wherein the inner layer and the outer layer collectively define thechannel between the inner layer first portion and the inner layer secondportion, wherein the channel extends longitudinally along the gripliner, wherein the channel is spaced-away from the first elongate slit;and

wherein the first elongate slit, the second elongate slit, and a regionof overlap between the outer layer and the inner layer first portion onthe opposite side of the second elongate slit collectively define thediscontinuity to permit the grip liner to transition between the restingconformation and the expanded conformation by permitting the inner layerfirst portion to slide relative to the outer layer and by permittingwidths of the first elongate slit and the second elongate slit to expandtoward the expanded conformation and contract toward the restingconformation.

In the present disclosure, several of the illustrative, non-exclusiveexamples have been discussed and/or presented in the context of flowdiagrams, or flow charts, in which the methods are shown and describedas a series of blocks, or steps. Unless specifically set forth in theaccompanying description, it is within the scope of the presentdisclosure that the order of the blocks may vary from the illustratedorder in the flow diagram, including with two or more of the blocks (orsteps) occurring in a different order and/or concurrently.

As used herein, the term “and/or” placed between a first entity and asecond entity means one of (1) the first entity, (2) the second entity,and (3) the first entity and the second entity. Multiple entities listedwith “and/or” should be construed in the same manner, i.e., “one ormore” of the entities so conjoined. Other entities may optionally bepresent other than the entities specifically identified by the “and/or”clause, whether related or unrelated to those entities specificallyidentified. Thus, as a non-limiting example, a reference to “A and/orB,” when used in conjunction with open-ended language such as“comprising” may refer, in one embodiment, to A only (optionallyincluding entities other than B); in another embodiment, to B only(optionally including entities other than A); in yet another embodiment,to both A and B (optionally including other entities). These entitiesmay refer to elements, actions, structures, steps, operations, values,and the like.

As used herein, the phrase “at least one of” or “one of” in reference toa list of one or more entities should be understood to mean at least oneentity selected from any one or more of the entity in the list ofentities, but not necessarily including at least one of each and everyentity specifically listed within the list of entities and not excludingany combinations of entities in the list of entities. This definitionalso allows that entities may optionally be present other than theentities specifically identified within the list of entities to whichthe phrase “at least one of” or “one of” refers, whether related orunrelated to those entities specifically identified. Thus, as anon-limiting example, “at least one of A and B” and “one of A and B”(or, equivalently, “at least one of A or B,” “one of A or B” or,equivalently “at least one of A and/or B”) may refer, in one embodiment,to at least one, optionally including more than one, A, with no Bpresent (and optionally including entities other than B); in anotherembodiment, to at least one, optionally including more than one, B, withno A present (and optionally including entities other than A); in yetanother embodiment, to at least one, optionally including more than one,A, and at least one, optionally including more than one, B (andoptionally including other entities). In other words, the phrases “atleast one of,” “one of,” “one or more of,” and “and/or” are open-endedexpressions that are both conjunctive and disjunctive in operation. Forexample, each of the expressions “at least one of A, B and C,” “at leastone of A, B, or C,” “one or more of A, B, and C,” “one or more of A, B,or C” and “A, B, and/or C” may mean A alone, B alone, C alone, A and Btogether, A and C together, B and C together, A, B and C together, andoptionally any of the above in combination with at least one otherentity.

As used herein the term “configured” mean that the element, component,or other subject matter is designed and/or intended to perform a givenfunction. Thus, the use of the term “configured” should not be construedto mean that a given element, component, or other subject matter issimply “capable of” performing a given function but that the element,component, and/or other subject matter is specifically selected,created, implemented, utilized, programmed, and/or designed for thepurpose of performing the function. It is also within the scope of thepresent disclosure that elements, components, and/or other recitedsubject matter that is recited as being adapted to perform a particularfunction may additionally or alternatively be described as beingconfigured to perform that function, and vice versa.

As used herein, the terms “selective” and “selectively,” when modifyingan action, movement, configuration, or other activity of one or morecomponents or characteristics of an apparatus, mean that the specificaction, movement, configuration, or other activity is a direct orindirect result of user manipulation of an aspect of, or one or morecomponents of, the apparatus.

The various disclosed elements of apparatuses and steps of methodsdisclosed herein are not required to all apparatuses and methodsaccording to the present disclosure, and the present disclosure includesall novel and non-obvious combinations and subcombinations of thevarious elements and steps disclosed herein. Moreover, one or more ofthe various elements and steps disclosed herein may define independentinventive subject matter that is separate and apart from the whole of adisclosed apparatus or method. Accordingly, such inventive subjectmatter is not required to be associated with the specific apparatusesand methods that are expressly disclosed herein, and such inventivesubject matter may find utility in apparatuses and/or methods that arenot expressly disclosed herein.

As used herein, the phrase, “for example,” the phrase, “as an example,”and/or simply the term “example,” when used with reference to one ormore components, features, details, structures, embodiments, and/ormethods according to the present disclosure, are intended to convey thatthe described component, feature, detail, structure, embodiment, and/ormethod is an illustrative, non-exclusive example of components,features, details, structures, embodiments, and/or methods according tothe present disclosure. Thus, the described component, feature, detail,structure, embodiment, and/or method is not intended to be limiting,required, or exclusive/exhaustive; and other components, features,details, structures, embodiments, and/or methods, including structurallyand/or functionally similar and/or equivalent components, features,details, structures, embodiments, and/or methods, are also within thescope of the present disclosure.

1. A grip assembly, comprising: a grip sleeve, wherein the grip sleevedefines an interior space and is configured to be selectively positionedon a shaft such that a portion of the shaft is within the interior spaceand further configured to be selectively removed from the shaft, whereinthe grip sleeve comprises an outer grip surface for engagement by a userand an inner grip surface opposite the outer grip surface and that facesthe interior space, and wherein the grip sleeve is constructed of aresilient material; and a grip liner positioned adjacent the inner gripsurface of the grip sleeve, wherein the grip liner is substantiallytubular in overall shape and has a first liner end and a second linerend longitudinally opposite the first liner end, wherein at least aportion of the grip liner is fixed to the inner grip surface of the gripsleeve, wherein the grip liner is configured to radially expand, inresponse to an outward radial force exerted on the grip liner, from aresting conformation to an expanded conformation, and wherein the gripliner comprises: an inner layer having a first elongate slit separatingan inner layer first portion and an inner layer second portion; and anouter layer radially outward from the inner layer and having a secondelongate slit spaced-away from the first elongate slit; wherein theinner layer first portion is fixed to the outer layer on one side of thesecond elongate slit and is permitted to slide relative to the outerlayer on an opposite side of the second elongate slit, and wherein theinner layer second portion is fixed to the outer layer; wherein theinner layer and the outer layer collectively define a channel betweenthe inner layer first portion and the inner layer second portion,wherein the channel extends longitudinally along the grip liner from thesecond liner end toward the first liner end, wherein the channel isspaced-away from the first elongate slit, wherein the channel isconfigured to mate with a corresponding ridge associated with the shaftand restrict rotation of the grip sleeve relative to the shaft when theshaft is positioned within the interior space and when the channel andthe ridge are mated, and wherein the channel is configured to initiallymate with the ridge at the second liner end as the shaft is selectivelypositioned within the interior space of the grip sleeve; and wherein thefirst elongate slit, the second elongate slit, and a region of overlapbetween the outer layer and the inner layer first portion on theopposite side of the second elongate slit collectively define adiscontinuity that permits the grip liner to transition between theresting conformation and the expanded conformation by permitting theinner layer first portion to slide relative to the outer layer and bypermitting widths of the first elongate slit and the second elongateslit to expand toward the expanded conformation and contract toward theresting conformation.
 2. The grip assembly of claim 1, wherein the gripassembly is configured to substantially prevent rotation of the gripsleeve with respect to the shaft when the grip sleeve is positioned onthe shaft.
 3. The grip assembly of claim 1, wherein the outer layer ofthe grip liner comprises an outer liner surface, and wherein only aportion of the outer liner surface is fixed to the inner grip surface ofthe grip sleeve.
 4. The grip assembly of claim 1, wherein the channel istapered such that a channel width of the channel continuously decreasesfrom a second channel end at the second liner end to a first channel endtoward the first liner end opposite the second liner end; and whereinthe ridge is tapered such that a ridge width of the ridge continuouslydecreases from a first ridge end to a second ridge end opposite thefirst ridge end, and wherein when the channel is mated with the ridge,the first ridge end is adjacent the second channel end and the secondridge end is adjacent the first channel end.
 5. The grip assembly ofclaim 1, wherein the grip liner comprises a semi-rigid or rigidmaterial.
 6. The grip assembly of claim 1, further comprising the shaftand a shaft sheath, wherein the shaft sheath comprises the ridge,wherein the shaft sheath is conformed to an outer shaft surface of theshaft.
 7. The grip assembly of claim 6, wherein the shaft sheath is anadhesive-backed film.
 8. The grip assembly of claim 7, wherein the shaftsheath further comprises an alignment guide for aligning the shaftsheath with the shaft when adhering the shaft sheath to the shaft,wherein the alignment guide is encapsulated between layers of the shaftsheath, and wherein the alignment guide provides a visual guide foralignment of the channel with the ridge when a user is initiallyinstalling the grip assembly on the shaft.
 9. The grip assembly of claim1, further comprising a securement mechanism configured to secure thegrip sleeve to the shaft, wherein the securement mechanism comprises asleeve collar associated with the grip sleeve, wherein the sleeve collaris rigid and positioned within a butt end region of the grip sleeve,wherein the securement mechanism comprises a threaded shaft plugpositioned and secured within the shaft, and wherein the sleeve collarof the securement mechanism is configured to engage the threaded shaftplug within the shaft via a fastener positioned through the sleevecollar and the threaded shaft plug, and wherein the securement mechanismfurther comprises the fastener.
 10. A kit for retrofitting a golf dubshaft of a golf dub, the kit comprising: the grip assembly of claim 1;and a shaft sheath, wherein the shaft sheath is an adhesive-backed filmthat comprises the ridge and is configured to be adhered and conform toan outer shaft surface of the golf dub shaft.
 11. A kit for retrofittinga golf dub shaft of a golf dub, the kit comprising: two or more of thegrip assembly of claim 1; and at least one shaft sheath, wherein theshaft sheath is an adhesive-backed film that comprises the ridge and isconfigured to be adhered and conform to an outer shaft surface of thegolf dub shaft; wherein each grip assembly is configured to beselectively positioned on and removed from the golf dub shaft viaengagement with the shaft sheath when adhered to the golf dub shaft. 12.The kit of claim 11, wherein the shaft sheath comprises a plurality ofshaft sheaths each configured to be positioned on a respective golf dubshaft.
 13. A golf dub, comprising: the grip assembly of claim 1; theshaft, wherein the shaft is a golf dub shaft of the golf dub, wherein abutt end of the shaft is positioned within the interior space of thegrip sleeve, and wherein the ridge is mated with the channel; and a golfdub head coupled to the shaft opposite the butt end of the shaft. 14.The golf dub of claim 13, wherein the shaft is at least partiallyfrustoconical with a diameter that is greatest toward the butt end ofthe shaft.
 15. A golf dub, comprising: a shaft having a butt end regionand a head end region opposite the butt end region, wherein the shaftcomprises a shaft feature that extends longitudinally along at least aportion of the butt end region of the shaft; a head coupled to the shaftat a terminal end of the head end region of the shaft; and a gripassembly positioned over the butt end region of the shaft, wherein thegrip assembly is configured to be selectively removed from the shaft,and wherein the grip assembly comprises: a grip sleeve, wherein the gripsleeve defines an interior space, wherein the butt end region of theshaft is positioned within the interior space, wherein the grip sleevecomprises an outer grip surface for engagement by a user and an innergrip surface opposite the outer grip surface and that faces the interiorspace, and wherein the grip sleeve is constructed of a resilientmaterial; and a grip liner positioned adjacent the inner grip surface ofthe grip sleeve, wherein the grip liner is substantially tubular inoverall shape, wherein only a portion of the grip liner is fixed to theinner grip surface of the grip sleeve, wherein the grip liner isconfigured to radially expand in response to an outward radial forceexerted on the grip liner from a resting conformation to an expandedconformation, and to radially contract in response to removal of theoutward radial force from the expanded conformation toward the restingconformation, and wherein the grip liner comprises: a discontinuity thatextends longitudinally along the grip liner, wherein the discontinuityfacilitates radial expansion and contraction of the grip liner betweenthe resting conformation and the expanded conformation; and a linerfeature that extends longitudinally along the grip liner and is matedwith the shaft feature, wherein the liner feature aligns the grip sleeverelative to the shaft, wherein the liner feature restricts rotation ofthe grip sleeve relative to the shaft, and wherein one of the linerfeature or the shaft feature is a ridge and the other of the linerfeature or the shaft feature is a channel; wherein the grip linercomprises an inner layer and an outer layer; and wherein: the shaftfeature is the ridge, wherein the liner feature is the channel, andwherein the channel is defined between spaced apart regions of overlapbetween the inner layer and the outer layer of the grip liner; or theshaft feature is the channel, wherein the liner feature is the ridge,and wherein the ridge is formed by a region of overlap between the innerlayer and the outer layer of the grip liner.
 16. The golf club of claim15, wherein the discontinuity comprises at least one longitudinal slitbetween a first portion and a second portion of the grip liner.
 17. Thegolf club of claim 15, wherein the liner feature is a single linerfeature and the shaft feature is a single shaft feature.
 18. The golfclub of claim 15, wherein the shaft feature is the ridge, wherein theliner feature is the channel, and wherein the channel is defined betweenspaced apart regions of overlap between the inner layer and the outerlayer of the grip liner.
 19. The golf club of claim 15, wherein theshaft feature is the channel, wherein the liner feature is the ridge,and wherein the ridge is formed by the region of overlap between theinner layer and the outer layer of the grip liner.
 20. The golf dub ofclaim 15, wherein the liner feature is tapered such that a liner featurewidth of the liner feature continuously decreases from one longitudinalend of the liner feature to an opposite longitudinal end of the linerfeature; and wherein the shaft feature is tapered such that a shaftfeature width of the shaft feature continuously decreases from onelongitudinal end of the shaft feature to an opposite longitudinal end ofthe shaft feature.
 21. The golf dub of claim 15, wherein the grip lineris composed of a semi-rigid or rigid material.
 22. The golf dub of claim15, wherein the shaft comprises a shaft core and a shaft sheath, whereinthe shaft sheath comprises the shaft feature, wherein the shaft sheathis coupled and conformed to the shaft core within the butt end region ofthe shaft.
 23. The golf club of claim 22, wherein the shaft sheathcomprises an adhesive-backed film that is adhered to the shaft corewithin the butt end region of the shaft.
 24. The golf dub of claim 23,wherein the shaft sheath further comprises an alignment guide foraligning the shaft sheath with the shaft core when adhering the shaftsheath to the shaft core, wherein the alignment guide is encapsulatedbetween layers of the shaft sheath, and wherein the alignment guideprovides a visual guide for alignment of the liner feature with theshaft feature when a user is initially installing the grip assembly onthe shaft.
 25. The golf club of claim 15, further comprising asecurement mechanism that secures the grip sleeve to the shaft, whereinthe securement mechanism comprises: a sleeve collar at a butt end of thegrip sleeve; a threaded shaft plug positioned and secured within thebutt end region of the shaft; and a fastener, wherein the fastenerextends through the sleeve collar and mates with the threaded shaftplug.
 26. The golf club of claim 15, wherein the liner feature is thechannel and the shaft feature is the ridge; wherein the inner layer ofthe grip liner has a first elongate slit separating an inner layer firstportion and an inner layer second portion; wherein the outer layer ofthe grip liner is radially outward from the inner layer and has a secondelongate slit spaced-away from the first elongate slit; wherein theinner layer first portion is fixed to the outer layer on one side of thesecond elongate slit and is permitted to slide relative to the outerlayer on an opposite side of the second elongate slit, and wherein theinner layer second portion is fixed to the outer layer; wherein theinner layer and the outer layer collectively define the channel betweenthe inner layer first portion and the inner layer second portion,wherein the channel extends longitudinally along the grip liner, whereinthe channel is spaced-away from the first elongate slit; and wherein thefirst elongate slit, the second elongate slit, and a region of overlapbetween the outer layer and the inner layer first portion on theopposite side of the second elongate slit collectively define thediscontinuity to permit the grip liner to transition between the restingconformation and the expanded conformation by permitting the inner layerfirst portion to slide relative to the outer layer and by permittingwidths of the first elongate slit and the second elongate slit to expandtoward the expanded conformation and contract toward the restingconformation.
 27. The golf dub of claim 15, wherein the shaft is atleast partially frustoconical within the butt end region with a diameterthat is greatest away from the head end region of the shaft.
 28. A kitfor retrofitting a shaft of a golf dub, the kit comprising: a shaftsheath comprising an adhesive-backed film for being adhered andconformed to a butt end region of the shaft, wherein the shaft sheathcomprises a shaft feature; a grip assembly configured to be selectivelypositioned over and removed from the butt end region of the shaft andthe shaft sheath when the shaft sheath is adhered and conformed to thebutt end region of the shaft, wherein the grip assembly comprises: agrip sleeve, wherein the grip sleeve defines an interior space sized toreceive the butt end region of the shaft, wherein the grip sleevecomprises an outer grip surface for engagement by a user and an innergrip surface opposite the outer grip surface and that faces the interiorspace, and wherein the grip sleeve is constructed of a resilientmaterial; and a grip liner positioned adjacent the inner grip surface ofthe grip sleeve, wherein the grip liner is substantially tubular inoverall shape, wherein only a portion of the grip liner is fixed to theinner grip surface of the grip sleeve, wherein the grip liner isconfigured to radially expand in response to an outward radial forceexerted on the grip liner from a resting conformation to an expandedconformation, and to radially contract in response to removal of theoutward radial force and due to the resiliency of the grip sleeve fromthe expanded conformation toward the resting conformation, and whereinthe grip liner comprises: a discontinuity that extends longitudinallyalong the grip liner, wherein the discontinuity permits radial expansionand contraction of the grip liner between the resting conformation andthe expanded conformation; and a liner feature that extendslongitudinally along the grip liner and is configured to mate with theshaft feature when the shaft sheath is adhered and conformed to the buttend region of the shaft to restrict rotation of the grip sleeve relativeto the shaft, and wherein one of the liner feature or the shaft featureis a ridge and the other of the liner feature or the shaft feature is achannel.
 29. The kit of claim 28, wherein the discontinuity comprises atleast one longitudinal slit between a first portion and a second portionof the grip liner.
 30. The kit of claim 28, wherein the liner feature isa single liner feature and the shaft feature is a single shaft feature.31. The kit of claim 28, wherein the shaft feature is the ridge, whereinthe liner feature is the channel, and wherein the channel is definedbetween spaced apart regions of overlap between an inner layer and anouter layer of the grip liner.
 32. The kit of claim 28, wherein theshaft feature is the channel, wherein the liner feature is the ridge,and wherein the ridge is formed by a region of overlap between an innerlayer and an outer layer of the grip liner.
 33. The kit of claim 28,wherein the liner feature is tapered such that a liner feature width ofthe liner feature continuously decreases from one longitudinal end ofthe liner feature to an opposite longitudinal end of the liner feature;and wherein the shaft feature is tapered such that a shaft feature widthof the shaft feature continuously decreases from one longitudinal end ofthe shaft feature to an opposite longitudinal end of the shaft feature.34. The kit of claim 28, wherein the grip liner is composed of asemi-rigid or rigid material.
 35. The kit of claim 28, wherein the shaftsheath further comprises an alignment guide for aligning the shaftsheath with the shaft when adhering the shaft sheath to the shaft,wherein the alignment guide is encapsulated between layers of the shaftsheath, and wherein the alignment guide provides a visual guide foralignment of the liner feature with the shaft feature when a user isinitially installing the grip assembly on the shaft.
 36. The kit ofclaim 28, wherein the grip assembly further comprises a sleeve collar ata butt end of the grip sleeve; and wherein the kit further comprises: athreaded shaft plug configured to be positioned and secured within thebutt end region of the shaft; and a fastener configured to extendthrough the sleeve collar and mate with the threaded shaft plug whenpositioned and secured within the butt end region of the shaft to securethe grip assembly to the shaft.
 37. The kit of claim 28, wherein theliner feature is the channel and the shaft feature is the ridge; whereinthe grip liner comprises an inner layer having a first elongate slitseparating an inner layer first portion and an inner layer secondportion; wherein the grip liner further comprises an outer layerradially outward from the inner layer and having a second elongate slitspaced-away from the first elongate slit; wherein the inner layer firstportion is fixed to the outer layer on one side of the second elongateslit and is permitted to slide relative to the outer layer on anopposite side of the second elongate slit, and wherein the inner layersecond portion is fixed to the outer layer; wherein the inner layer andthe outer layer collectively define the channel between the inner layerfirst portion and the inner layer second portion, wherein the channelextends longitudinally along the grip liner, wherein the channel isspaced-away from the first elongate slit; and wherein the first elongateslit, the second elongate slit, and a region of overlap between theouter layer and the inner layer first portion on the opposite side ofthe second elongate slit collectively define the discontinuity to permitthe grip liner to transition between the resting conformation and theexpanded conformation by permitting the inner layer first portion toslide relative to the outer layer and by permitting widths of the firstelongate slit and the second elongate slit to expand toward the expandedconformation and contract toward the resting conformation.